diff --git a/src/libcore/num/wrapping.rs b/src/libcore/num/wrapping.rs
index 013f02685ba..6cc374b13b7 100644
--- a/src/libcore/num/wrapping.rs
+++ b/src/libcore/num/wrapping.rs
@@ -12,6 +12,7 @@ use super::Wrapping;
 
 use ops::*;
 
+#[allow(unused_macros)]
 macro_rules! sh_impl_signed {
     ($t:ident, $f:ident) => (
         #[stable(feature = "rust1", since = "1.0.0")]
diff --git a/src/libcore/ops.rs b/src/libcore/ops.rs
index 391b606f613..ca6438c0fa7 100644
--- a/src/libcore/ops.rs
+++ b/src/libcore/ops.rs
@@ -763,6 +763,7 @@ macro_rules! neg_impl_numeric {
     ($($t:ty)*) => { neg_impl_core!{ x => -x, $($t)*} }
 }
 
+#[allow(unused_macros)]
 macro_rules! neg_impl_unsigned {
     ($($t:ty)*) => {
         neg_impl_core!{ x => {