diff --git a/src/libcore/sync/atomic.rs b/src/libcore/sync/atomic.rs
index c13fd558354..d647a94a1ef 100644
--- a/src/libcore/sync/atomic.rs
+++ b/src/libcore/sync/atomic.rs
@@ -918,6 +918,7 @@ pub fn compare_exchange_weak(&self,
     }
 }
 
+#[cfg(target_has_atomic = "ptr")]
 macro_rules! atomic_int {
     ($stable:meta,
      $stable_cxchg:meta,