diff --git a/Cargo.toml b/Cargo.toml
index c468dc6..496ca27 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -55,7 +55,7 @@ version = "^2.0"
 default-features = false
 
 [dependencies.radium]
-version = "0.7"
+version = "1"
 
 [dependencies.serde]
 version = "1"
diff --git a/src/macros/tests.rs b/src/macros/tests.rs
index 4e921a9..79d7c49 100644
--- a/src/macros/tests.rs
+++ b/src/macros/tests.rs
@@ -231,50 +231,52 @@ fn compile_bits() {
 		let _: &BitSlice<u64, Msb0> = bits![u64, crate::order::Msb0; 1; 100];
 	}
 
-	radium::if_atomic! {
-		if atomic(8) {
-			let _: &BitSlice<AtomicU8, LocalBits> = bits![AtomicU8, LocalBits; 0, 1];
-			let _: &BitSlice<AtomicU8, Lsb0> = bits![AtomicU8, Lsb0; 0, 1];
-			let _: &BitSlice<AtomicU8, Msb0> = bits![AtomicU8, Msb0; 0, 1];
-			let _: &BitSlice<RadiumU8, LocalBits> = bits![RadiumU8, LocalBits; 1; 100];
-			let _: &BitSlice<RadiumU8, Lsb0> = bits![RadiumU8, Lsb0; 1; 100];
-			let _: &BitSlice<RadiumU8, Msb0> = bits![RadiumU8, Msb0; 1; 100];
-		}
-		if atomic(16) {
-			let _: &BitSlice<AtomicU16, LocalBits> = bits![AtomicU16, LocalBits; 0, 1];
-			let _: &BitSlice<AtomicU16, Lsb0> = bits![AtomicU16, Lsb0; 0, 1];
-			let _: &BitSlice<AtomicU16, Msb0> = bits![AtomicU16, Msb0; 0, 1];
-			let _: &BitSlice<RadiumU16, LocalBits> = bits![RadiumU16, LocalBits; 1; 100];
-			let _: &BitSlice<RadiumU16, Lsb0> = bits![RadiumU16, Lsb0; 1; 100];
-			let _: &BitSlice<RadiumU16, Msb0> = bits![RadiumU16, Msb0; 1; 100];
-		}
-		if atomic(32) {
-			let _: &BitSlice<AtomicU32, LocalBits> = bits![AtomicU32, LocalBits; 0, 1];
-			let _: &BitSlice<AtomicU32, Lsb0> = bits![AtomicU32, Lsb0; 0, 1];
-			let _: &BitSlice<AtomicU32, Msb0> = bits![AtomicU32, Msb0; 0, 1];
-			let _: &BitSlice<RadiumU32, LocalBits> = bits![RadiumU32, LocalBits; 1; 100];
-			let _: &BitSlice<RadiumU32, Lsb0> = bits![RadiumU32, Lsb0; 1; 100];
-			let _: &BitSlice<RadiumU32, Msb0> = bits![RadiumU32, Msb0; 1; 100];
-		}
-		if atomic(size) {
-			let _: &BitSlice<AtomicUsize, LocalBits> = bits![AtomicUsize, LocalBits; 0, 1];
-			let _: &BitSlice<AtomicUsize, Lsb0> = bits![AtomicUsize, Lsb0; 0, 1];
-			let _: &BitSlice<AtomicUsize, Msb0> = bits![AtomicUsize, Msb0; 0, 1];
-			let _: &BitSlice<RadiumUsize, LocalBits> = bits![RadiumUsize, LocalBits; 1; 100];
-			let _: &BitSlice<RadiumUsize, Lsb0> = bits![RadiumUsize, Lsb0; 1; 100];
-			let _: &BitSlice<RadiumUsize, Msb0> = bits![RadiumUsize, Msb0; 1; 100];
-		}
+	#[cfg(target_has_atomic = "8")]
+	{
+		let _: &BitSlice<AtomicU8, LocalBits> = bits![AtomicU8, LocalBits; 0, 1];
+		let _: &BitSlice<AtomicU8, Lsb0> = bits![AtomicU8, Lsb0; 0, 1];
+		let _: &BitSlice<AtomicU8, Msb0> = bits![AtomicU8, Msb0; 0, 1];
+		let _: &BitSlice<RadiumU8, LocalBits> = bits![RadiumU8, LocalBits; 1; 100];
+		let _: &BitSlice<RadiumU8, Lsb0> = bits![RadiumU8, Lsb0; 1; 100];
+		let _: &BitSlice<RadiumU8, Msb0> = bits![RadiumU8, Msb0; 1; 100];
+	}
+	#[cfg(target_has_atomic = "16")]
+	{
+		let _: &BitSlice<AtomicU16, LocalBits> = bits![AtomicU16, LocalBits; 0, 1];
+		let _: &BitSlice<AtomicU16, Lsb0> = bits![AtomicU16, Lsb0; 0, 1];
+		let _: &BitSlice<AtomicU16, Msb0> = bits![AtomicU16, Msb0; 0, 1];
+		let _: &BitSlice<RadiumU16, LocalBits> = bits![RadiumU16, LocalBits; 1; 100];
+		let _: &BitSlice<RadiumU16, Lsb0> = bits![RadiumU16, Lsb0; 1; 100];
+		let _: &BitSlice<RadiumU16, Msb0> = bits![RadiumU16, Msb0; 1; 100];
+	}
+	#[cfg(target_has_atomic = "32")]
+	{
+		let _: &BitSlice<AtomicU32, LocalBits> = bits![AtomicU32, LocalBits; 0, 1];
+		let _: &BitSlice<AtomicU32, Lsb0> = bits![AtomicU32, Lsb0; 0, 1];
+		let _: &BitSlice<AtomicU32, Msb0> = bits![AtomicU32, Msb0; 0, 1];
+		let _: &BitSlice<RadiumU32, LocalBits> = bits![RadiumU32, LocalBits; 1; 100];
+		let _: &BitSlice<RadiumU32, Lsb0> = bits![RadiumU32, Lsb0; 1; 100];
+		let _: &BitSlice<RadiumU32, Msb0> = bits![RadiumU32, Msb0; 1; 100];
+	}
+	#[cfg(target_has_atomic = "ptr")]
+	{
+		let _: &BitSlice<AtomicUsize, LocalBits> = bits![AtomicUsize, LocalBits; 0, 1];
+		let _: &BitSlice<AtomicUsize, Lsb0> = bits![AtomicUsize, Lsb0; 0, 1];
+		let _: &BitSlice<AtomicUsize, Msb0> = bits![AtomicUsize, Msb0; 0, 1];
+		let _: &BitSlice<RadiumUsize, LocalBits> = bits![RadiumUsize, LocalBits; 1; 100];
+		let _: &BitSlice<RadiumUsize, Lsb0> = bits![RadiumUsize, Lsb0; 1; 100];
+		let _: &BitSlice<RadiumUsize, Msb0> = bits![RadiumUsize, Msb0; 1; 100];
 	}
+
 	#[cfg(target_pointer_width = "64")]
-	radium::if_atomic! {
-		if atomic(64) {
-			let _: &BitSlice<AtomicU64, LocalBits> = bits![AtomicU64, LocalBits; 0, 1];
-			let _: &BitSlice<AtomicU64, Lsb0> = bits![AtomicU64, Lsb0; 0, 1];
-			let _: &BitSlice<AtomicU64, Msb0> = bits![AtomicU64, Msb0; 0, 1];
-			let _: &BitSlice<RadiumU64, LocalBits> = bits![RadiumU64, LocalBits; 1; 100];
-			let _: &BitSlice<RadiumU64, Lsb0> = bits![RadiumU64, Lsb0; 1; 100];
-			let _: &BitSlice<RadiumU64, Msb0> = bits![RadiumU64, Msb0; 1; 100];
-		}
+	#[cfg(target_has_atomic = "64")]
+	{
+		let _: &BitSlice<AtomicU64, LocalBits> = bits![AtomicU64, LocalBits; 0, 1];
+		let _: &BitSlice<AtomicU64, Lsb0> = bits![AtomicU64, Lsb0; 0, 1];
+		let _: &BitSlice<AtomicU64, Msb0> = bits![AtomicU64, Msb0; 0, 1];
+		let _: &BitSlice<RadiumU64, LocalBits> = bits![RadiumU64, LocalBits; 1; 100];
+		let _: &BitSlice<RadiumU64, Lsb0> = bits![RadiumU64, Lsb0; 1; 100];
+		let _: &BitSlice<RadiumU64, Msb0> = bits![RadiumU64, Msb0; 1; 100];
 	}
 }
 
@@ -346,50 +348,51 @@ fn compile_bitvec() {
 			bitvec![Cell<u64>, crate::order::Msb0; 1; 100];
 		let _: BitVec<u64, Msb0> = bitvec![u64, crate::order::Msb0; 1; 100];
 	}
-	radium::if_atomic! {
-		if atomic(8) {
-			let _: BitVec<AtomicU8, LocalBits> =bitvec![AtomicU8, LocalBits; 0, 1];
-			let _: BitVec<AtomicU8, Lsb0> =bitvec![AtomicU8, Lsb0; 0, 1];
-			let _: BitVec<AtomicU8, Msb0> =bitvec![AtomicU8, Msb0; 0, 1];
-			let _: BitVec<RadiumU8, LocalBits> =bitvec![RadiumU8, LocalBits; 1; 100];
-			let _: BitVec<RadiumU8, Lsb0> =bitvec![RadiumU8, Lsb0; 1; 100];
-			let _: BitVec<RadiumU8, Msb0> =bitvec![RadiumU8, Msb0; 1; 100];
-		}
-		if atomic(16) {
-			let _: BitVec<AtomicU16, LocalBits> =bitvec![AtomicU16, LocalBits; 0, 1];
-			let _: BitVec<AtomicU16, Lsb0> =bitvec![AtomicU16, Lsb0; 0, 1];
-			let _: BitVec<AtomicU16, Msb0> =bitvec![AtomicU16, Msb0; 0, 1];
-			let _: BitVec<RadiumU16, LocalBits> =bitvec![RadiumU16, LocalBits; 1; 100];
-			let _: BitVec<RadiumU16, Lsb0> =bitvec![RadiumU16, Lsb0; 1; 100];
-			let _: BitVec<RadiumU16, Msb0> =bitvec![RadiumU16, Msb0; 1; 100];
-		}
-		if atomic(32) {
-			let _: BitVec<AtomicU32, LocalBits> =bitvec![AtomicU32, LocalBits; 0, 1];
-			let _: BitVec<AtomicU32, Lsb0> =bitvec![AtomicU32, Lsb0; 0, 1];
-			let _: BitVec<AtomicU32, Msb0> =bitvec![AtomicU32, Msb0; 0, 1];
-			let _: BitVec<RadiumU32, LocalBits> =bitvec![RadiumU32, LocalBits; 1; 100];
-			let _: BitVec<RadiumU32, Lsb0> =bitvec![RadiumU32, Lsb0; 1; 100];
-			let _: BitVec<RadiumU32, Msb0> =bitvec![RadiumU32, Msb0; 1; 100];
-		}
-		if atomic(size) {
-			let _: BitVec<AtomicUsize, LocalBits> =bitvec![AtomicUsize, LocalBits; 0, 1];
-			let _: BitVec<AtomicUsize, Lsb0> =bitvec![AtomicUsize, Lsb0; 0, 1];
-			let _: BitVec<AtomicUsize, Msb0> =bitvec![AtomicUsize, Msb0; 0, 1];
-			let _: BitVec<RadiumUsize, LocalBits> =bitvec![RadiumUsize, LocalBits; 1; 100];
-			let _: BitVec<RadiumUsize, Lsb0> =bitvec![RadiumUsize, Lsb0; 1; 100];
-			let _: BitVec<RadiumUsize, Msb0> =bitvec![RadiumUsize, Msb0; 1; 100];
-		}
+	#[cfg(target_has_atomic = "8")]
+	{
+		let _: BitVec<AtomicU8, LocalBits> =bitvec![AtomicU8, LocalBits; 0, 1];
+		let _: BitVec<AtomicU8, Lsb0> =bitvec![AtomicU8, Lsb0; 0, 1];
+		let _: BitVec<AtomicU8, Msb0> =bitvec![AtomicU8, Msb0; 0, 1];
+		let _: BitVec<RadiumU8, LocalBits> =bitvec![RadiumU8, LocalBits; 1; 100];
+		let _: BitVec<RadiumU8, Lsb0> =bitvec![RadiumU8, Lsb0; 1; 100];
+		let _: BitVec<RadiumU8, Msb0> =bitvec![RadiumU8, Msb0; 1; 100];
+	}
+	#[cfg(target_has_atomic = "16")]
+	{
+		let _: BitVec<AtomicU16, LocalBits> =bitvec![AtomicU16, LocalBits; 0, 1];
+		let _: BitVec<AtomicU16, Lsb0> =bitvec![AtomicU16, Lsb0; 0, 1];
+		let _: BitVec<AtomicU16, Msb0> =bitvec![AtomicU16, Msb0; 0, 1];
+		let _: BitVec<RadiumU16, LocalBits> =bitvec![RadiumU16, LocalBits; 1; 100];
+		let _: BitVec<RadiumU16, Lsb0> =bitvec![RadiumU16, Lsb0; 1; 100];
+		let _: BitVec<RadiumU16, Msb0> =bitvec![RadiumU16, Msb0; 1; 100];
+	}
+	#[cfg(target_has_atomic = "32")]
+	{
+		let _: BitVec<AtomicU32, LocalBits> =bitvec![AtomicU32, LocalBits; 0, 1];
+		let _: BitVec<AtomicU32, Lsb0> =bitvec![AtomicU32, Lsb0; 0, 1];
+		let _: BitVec<AtomicU32, Msb0> =bitvec![AtomicU32, Msb0; 0, 1];
+		let _: BitVec<RadiumU32, LocalBits> =bitvec![RadiumU32, LocalBits; 1; 100];
+		let _: BitVec<RadiumU32, Lsb0> =bitvec![RadiumU32, Lsb0; 1; 100];
+		let _: BitVec<RadiumU32, Msb0> =bitvec![RadiumU32, Msb0; 1; 100];
+	}
+	#[cfg(target_has_atomic = "ptr")]
+	{
+		let _: BitVec<AtomicUsize, LocalBits> =bitvec![AtomicUsize, LocalBits; 0, 1];
+		let _: BitVec<AtomicUsize, Lsb0> =bitvec![AtomicUsize, Lsb0; 0, 1];
+		let _: BitVec<AtomicUsize, Msb0> =bitvec![AtomicUsize, Msb0; 0, 1];
+		let _: BitVec<RadiumUsize, LocalBits> =bitvec![RadiumUsize, LocalBits; 1; 100];
+		let _: BitVec<RadiumUsize, Lsb0> =bitvec![RadiumUsize, Lsb0; 1; 100];
+		let _: BitVec<RadiumUsize, Msb0> =bitvec![RadiumUsize, Msb0; 1; 100];
 	}
 	#[cfg(target_pointer_width = "64")]
-	radium::if_atomic! {
-		if atomic(64) {
-			let _: BitVec<AtomicU64, LocalBits> =bitvec![AtomicU64, LocalBits; 0, 1];
-			let _: BitVec<AtomicU64, Lsb0> =bitvec![AtomicU64, Lsb0; 0, 1];
-			let _: BitVec<AtomicU64, Msb0> =bitvec![AtomicU64, Msb0; 0, 1];
-			let _: BitVec<RadiumU64, LocalBits> =bitvec![RadiumU64, LocalBits; 1; 100];
-			let _: BitVec<RadiumU64, Lsb0> =bitvec![RadiumU64, Lsb0; 1; 100];
-			let _: BitVec<RadiumU64, Msb0> =bitvec![RadiumU64, Msb0; 1; 100];
-		}
+	#[cfg(target_has_atomic = "64")]
+	{
+		let _: BitVec<AtomicU64, LocalBits> =bitvec![AtomicU64, LocalBits; 0, 1];
+		let _: BitVec<AtomicU64, Lsb0> =bitvec![AtomicU64, Lsb0; 0, 1];
+		let _: BitVec<AtomicU64, Msb0> =bitvec![AtomicU64, Msb0; 0, 1];
+		let _: BitVec<RadiumU64, LocalBits> =bitvec![RadiumU64, LocalBits; 1; 100];
+		let _: BitVec<RadiumU64, Lsb0> =bitvec![RadiumU64, Lsb0; 1; 100];
+		let _: BitVec<RadiumU64, Msb0> =bitvec![RadiumU64, Msb0; 1; 100];
 	}
 }
 
@@ -461,50 +464,51 @@ fn compile_bitbox() {
 			bitbox![Cell<u64>, crate::order::Msb0; 1; 100];
 		let _: BitBox<u64, Msb0> = bitbox![u64, crate::order::Msb0; 1; 100];
 	}
-	radium::if_atomic! {
-		if atomic(8) {
-			let _: BitBox<AtomicU8, LocalBits> =bitbox![AtomicU8, LocalBits; 0, 1];
-			let _: BitBox<AtomicU8, Lsb0> =bitbox![AtomicU8, Lsb0; 0, 1];
-			let _: BitBox<AtomicU8, Msb0> =bitbox![AtomicU8, Msb0; 0, 1];
-			let _: BitBox<RadiumU8, LocalBits> =bitbox![RadiumU8, LocalBits; 1; 100];
-			let _: BitBox<RadiumU8, Lsb0> =bitbox![RadiumU8, Lsb0; 1; 100];
-			let _: BitBox<RadiumU8, Msb0> =bitbox![RadiumU8, Msb0; 1; 100];
-		}
-		if atomic(16) {
-			let _: BitBox<AtomicU16, LocalBits> =bitbox![AtomicU16, LocalBits; 0, 1];
-			let _: BitBox<AtomicU16, Lsb0> =bitbox![AtomicU16, Lsb0; 0, 1];
-			let _: BitBox<AtomicU16, Msb0> =bitbox![AtomicU16, Msb0; 0, 1];
-			let _: BitBox<RadiumU16, LocalBits> =bitbox![RadiumU16, LocalBits; 1; 100];
-			let _: BitBox<RadiumU16, Lsb0> =bitbox![RadiumU16, Lsb0; 1; 100];
-			let _: BitBox<RadiumU16, Msb0> =bitbox![RadiumU16, Msb0; 1; 100];
-		}
-		if atomic(32) {
-			let _: BitBox<AtomicU32, LocalBits> =bitbox![AtomicU32, LocalBits; 0, 1];
-			let _: BitBox<AtomicU32, Lsb0> =bitbox![AtomicU32, Lsb0; 0, 1];
-			let _: BitBox<AtomicU32, Msb0> =bitbox![AtomicU32, Msb0; 0, 1];
-			let _: BitBox<RadiumU32, LocalBits> =bitbox![RadiumU32, LocalBits; 1; 100];
-			let _: BitBox<RadiumU32, Lsb0> =bitbox![RadiumU32, Lsb0; 1; 100];
-			let _: BitBox<RadiumU32, Msb0> =bitbox![RadiumU32, Msb0; 1; 100];
-		}
-		if atomic(size) {
-			let _: BitBox<AtomicUsize, LocalBits> =bitbox![AtomicUsize, LocalBits; 0, 1];
-			let _: BitBox<AtomicUsize, Lsb0> =bitbox![AtomicUsize, Lsb0; 0, 1];
-			let _: BitBox<AtomicUsize, Msb0> =bitbox![AtomicUsize, Msb0; 0, 1];
-			let _: BitBox<RadiumUsize, LocalBits> =bitbox![RadiumUsize, LocalBits; 1; 100];
-			let _: BitBox<RadiumUsize, Lsb0> =bitbox![RadiumUsize, Lsb0; 1; 100];
-			let _: BitBox<RadiumUsize, Msb0> =bitbox![RadiumUsize, Msb0; 1; 100];
-		}
+	#[cfg(target_has_atomic = "8")]
+	{
+		let _: BitBox<AtomicU8, LocalBits> =bitbox![AtomicU8, LocalBits; 0, 1];
+		let _: BitBox<AtomicU8, Lsb0> =bitbox![AtomicU8, Lsb0; 0, 1];
+		let _: BitBox<AtomicU8, Msb0> =bitbox![AtomicU8, Msb0; 0, 1];
+		let _: BitBox<RadiumU8, LocalBits> =bitbox![RadiumU8, LocalBits; 1; 100];
+		let _: BitBox<RadiumU8, Lsb0> =bitbox![RadiumU8, Lsb0; 1; 100];
+		let _: BitBox<RadiumU8, Msb0> =bitbox![RadiumU8, Msb0; 1; 100];
+	}
+	#[cfg(target_has_atomic = "16")]
+	{
+		let _: BitBox<AtomicU16, LocalBits> =bitbox![AtomicU16, LocalBits; 0, 1];
+		let _: BitBox<AtomicU16, Lsb0> =bitbox![AtomicU16, Lsb0; 0, 1];
+		let _: BitBox<AtomicU16, Msb0> =bitbox![AtomicU16, Msb0; 0, 1];
+		let _: BitBox<RadiumU16, LocalBits> =bitbox![RadiumU16, LocalBits; 1; 100];
+		let _: BitBox<RadiumU16, Lsb0> =bitbox![RadiumU16, Lsb0; 1; 100];
+		let _: BitBox<RadiumU16, Msb0> =bitbox![RadiumU16, Msb0; 1; 100];
+	}
+	#[cfg(target_has_atomic = "32")]
+	{
+		let _: BitBox<AtomicU32, LocalBits> =bitbox![AtomicU32, LocalBits; 0, 1];
+		let _: BitBox<AtomicU32, Lsb0> =bitbox![AtomicU32, Lsb0; 0, 1];
+		let _: BitBox<AtomicU32, Msb0> =bitbox![AtomicU32, Msb0; 0, 1];
+		let _: BitBox<RadiumU32, LocalBits> =bitbox![RadiumU32, LocalBits; 1; 100];
+		let _: BitBox<RadiumU32, Lsb0> =bitbox![RadiumU32, Lsb0; 1; 100];
+		let _: BitBox<RadiumU32, Msb0> =bitbox![RadiumU32, Msb0; 1; 100];
+	}
+	#[cfg(target_has_atomic = "ptr")]
+	{
+		let _: BitBox<AtomicUsize, LocalBits> =bitbox![AtomicUsize, LocalBits; 0, 1];
+		let _: BitBox<AtomicUsize, Lsb0> =bitbox![AtomicUsize, Lsb0; 0, 1];
+		let _: BitBox<AtomicUsize, Msb0> =bitbox![AtomicUsize, Msb0; 0, 1];
+		let _: BitBox<RadiumUsize, LocalBits> =bitbox![RadiumUsize, LocalBits; 1; 100];
+		let _: BitBox<RadiumUsize, Lsb0> =bitbox![RadiumUsize, Lsb0; 1; 100];
+		let _: BitBox<RadiumUsize, Msb0> =bitbox![RadiumUsize, Msb0; 1; 100];
 	}
 	#[cfg(target_pointer_width = "64")]
-	radium::if_atomic! {
-		if atomic(64) {
-			let _: BitBox<AtomicU64, LocalBits> =bitbox![AtomicU64, LocalBits; 0, 1];
-			let _: BitBox<AtomicU64, Lsb0> =bitbox![AtomicU64, Lsb0; 0, 1];
-			let _: BitBox<AtomicU64, Msb0> =bitbox![AtomicU64, Msb0; 0, 1];
-			let _: BitBox<RadiumU64, LocalBits> =bitbox![RadiumU64, LocalBits; 1; 100];
-			let _: BitBox<RadiumU64, Lsb0> =bitbox![RadiumU64, Lsb0; 1; 100];
-			let _: BitBox<RadiumU64, Msb0> =bitbox![RadiumU64, Msb0; 1; 100];
-		}
+	#[cfg(target_has_atomic = "64")]
+	{
+		let _: BitBox<AtomicU64, LocalBits> =bitbox![AtomicU64, LocalBits; 0, 1];
+		let _: BitBox<AtomicU64, Lsb0> =bitbox![AtomicU64, Lsb0; 0, 1];
+		let _: BitBox<AtomicU64, Msb0> =bitbox![AtomicU64, Msb0; 0, 1];
+		let _: BitBox<RadiumU64, LocalBits> =bitbox![RadiumU64, LocalBits; 1; 100];
+		let _: BitBox<RadiumU64, Lsb0> =bitbox![RadiumU64, Lsb0; 1; 100];
+		let _: BitBox<RadiumU64, Msb0> =bitbox![RadiumU64, Msb0; 1; 100];
 	}
 }
 
diff --git a/src/mem.rs b/src/mem.rs
index b10f9fc..917bcf8 100644
--- a/src/mem.rs
+++ b/src/mem.rs
@@ -101,30 +101,30 @@ macro_rules! element {
 			}
 		}
 
-		radium::if_atomic!( if atomic($size) {
-			use core::sync::atomic::$atom;
-			impl BitElement<$atom> {
-				/// Creates a new element wrapper from a raw integer.
-				pub const fn new(elem: $bare) -> Self {
-					Self {
-						elem: <$atom>::new(elem),
-					}
+		#[cfg(target_has_atomic = $size)]
+		use core::sync::atomic::$atom;
+		#[cfg(target_has_atomic = $size)]
+		impl BitElement<$atom> {
+			/// Creates a new element wrapper from a raw integer.
+			pub const fn new(elem: $bare) -> Self {
+				Self {
+					elem: <$atom>::new(elem),
 				}
 			}
-		});
+		}
 	)+ };
 }
 
 element! {
-	8, u8 => AtomicU8;
-	16, u16 => AtomicU16;
-	32, u32 => AtomicU32;
+	"8", u8 => AtomicU8;
+	"16", u16 => AtomicU16;
+	"32", u32 => AtomicU32;
 }
 
 #[cfg(target_pointer_width = "64")]
-element!(64, u64 => AtomicU64);
+element!("64", u64 => AtomicU64);
 
-element!(size, usize => AtomicUsize);
+element!("ptr", usize => AtomicUsize);
 
 #[cfg(test)]
 mod tests {
diff --git a/src/serdes.rs b/src/serdes.rs
index 4251cc0..dbc309c 100644
--- a/src/serdes.rs
+++ b/src/serdes.rs
@@ -112,36 +112,39 @@ mod tests {
 			Msb0 @ RadiumU8, RadiumU16, RadiumU32, RadiumUsize;
 			LocalBits @ RadiumU8, RadiumU16, RadiumU32, RadiumUsize;
 		}
-		radium::if_atomic! {
-			if atomic(8) {
-				check_impl! {
-					Lsb0 @ AtomicU8;
-					Msb0 @ AtomicU8;
-					LocalBits @ AtomicU8;
-				}
+		#[cfg(target_has_atomic = "8")]
+		{
+			check_impl! {
+				Lsb0 @ AtomicU8;
+				Msb0 @ AtomicU8;
+				LocalBits @ AtomicU8;
 			}
-			if atomic(16) {
-				check_impl! {
-					Lsb0 @ AtomicU16;
-					Msb0 @ AtomicU16;
-					LocalBits @ AtomicU16;
-				}
+		}
+		#[cfg(target_has_atomic = "16")]
+		{
+			check_impl! {
+				Lsb0 @ AtomicU16;
+				Msb0 @ AtomicU16;
+				LocalBits @ AtomicU16;
 			}
-			if atomic(32) {
-				check_impl! {
-					Lsb0 @ AtomicU32;
-					Msb0 @ AtomicU32;
-					LocalBits @ AtomicU32;
-				}
+		}
+		#[cfg(target_has_atomic = "32")]
+		{
+			check_impl! {
+				Lsb0 @ AtomicU32;
+				Msb0 @ AtomicU32;
+				LocalBits @ AtomicU32;
 			}
-			if atomic(ptr) {
-				check_impl! {
-					Lsb0 @ AtomicUsize;
-					Msb0 @ AtomicUsize;
-					LocalBits @ AtomicUsize;
-				}
+		}
+		#[cfg(target_has_atomic = "ptr")]
+		{
+			check_impl! {
+				Lsb0 @ AtomicUsize;
+				Msb0 @ AtomicUsize;
+				LocalBits @ AtomicUsize;
 			}
 		}
+
 		#[cfg(target_pointer_width = "64")]
 		check_impl! {
 			Lsb0 @ u64, RadiumU64;
@@ -149,12 +152,13 @@ mod tests {
 			LocalBits @ u64, RadiumU64;
 		}
 		#[cfg(target_pointer_width = "64")]
-		radium::if_atomic!(if atomic(64) {
+		#[cfg(target_has_atomic = "64")]
+		{
 			check_impl! {
 				Lsb0 @ AtomicU64;
 				Msb0 @ AtomicU64;
 				LocalBits @ AtomicU64;
 			}
-		});
+		}
 	}
 }
diff --git a/src/store.rs b/src/store.rs
index 00b52af..475da19 100644
--- a/src/store.rs
+++ b/src/store.rs
@@ -199,49 +199,49 @@ store!(usize => BitSafeUsize);
 /// Generates `BitStore` implementations for atomic types.
 macro_rules! atomic {
 	($($size:tt, $base:ty => $atom:ident);+ $(;)?) => { $(
-		radium::if_atomic!(if atomic($size) {
-			use core::sync::atomic::$atom;
+		#[cfg(target_has_atomic = $size)]
+		use core::sync::atomic::$atom;
 
-			impl BitStore for $atom {
-				type Mem = $base;
-				type Access = Self;
-				type Alias = Self;
-				type Unalias = Self;
+		#[cfg(target_has_atomic = $size)]
+		impl BitStore for $atom {
+			type Mem = $base;
+			type Access = Self;
+			type Alias = Self;
+			type Unalias = Self;
 
-				const ZERO: Self = <Self>::new(0);
+			const ZERO: Self = <Self>::new(0);
 
-				#[inline]
-				fn new(value: Self::Mem) -> Self { <Self>::new(value) }
+			#[inline]
+			fn new(value: Self::Mem) -> Self { <Self>::new(value) }
 
-				#[inline]
-				fn load_value(&self) -> Self::Mem {
-					self.load(core::sync::atomic::Ordering::Relaxed)
-				}
+			#[inline]
+			fn load_value(&self) -> Self::Mem {
+				self.load(core::sync::atomic::Ordering::Relaxed)
+			}
 
-				#[inline]
-				fn store_value(&mut self, value: Self::Mem) {
-					*self = Self::new(value);
-				}
+			#[inline]
+			fn store_value(&mut self, value: Self::Mem) {
+				*self = Self::new(value);
+			}
 
-				const ALIGNED_TO_SIZE: [(); 1]
-					= [(); mem::aligned_to_size::<Self>() as usize];
+			const ALIGNED_TO_SIZE: [(); 1]
+				= [(); mem::aligned_to_size::<Self>() as usize];
 
-				const ALIAS_WIDTH: [(); 1] = [()];
-			}
-		});
+			const ALIAS_WIDTH: [(); 1] = [()];
+		}
 	)+ };
 }
 
 atomic! {
-	8, u8 => AtomicU8;
-	16, u16 => AtomicU16;
-	32, u32 => AtomicU32;
+	"8", u8 => AtomicU8;
+	"16", u16 => AtomicU16;
+	"32", u32 => AtomicU32;
 }
 
 #[cfg(target_pointer_width = "64")]
-atomic!(64, u64 => AtomicU64);
+atomic!("64", u64 => AtomicU64);
 
-atomic!(size, usize => AtomicUsize);
+atomic!("ptr", usize => AtomicUsize);
 
 #[cfg(test)]
 mod tests {
@@ -265,11 +265,12 @@ mod tests {
 		cell.store_value(39);
 		assert_eq!(cell.load_value(), 39);
 
-		radium::if_atomic!(if atomic(size) {
+		#[cfg(target_has_atomic = "ptr")]
+		{
 			let mut atom = AtomicUsize::new(0);
 			atom.store_value(57);
 			assert_eq!(atom.load_value(), 57);
-		});
+		}
 	}
 
 	/// Unaliased `BitSlice`s are universally threadsafe, because they satisfy
