1 files changed, 7 insertions, 0 deletions
diff --git a/src/libsyntax/ptr.rs b/src/libsyntax/ptr.rs
index 01f3839b039..adb5383a8fd 100644
--- a/src/libsyntax/ptr.rs
+++ b/src/libsyntax/ptr.rs
@@ -111,11 +111,18 @@ impl<T: Display> Display for P<T> {
     }
 }
 
+#[cfg(stage0)]
 impl<S: Hasher, T: Hash<S>> Hash<S> for P<T> {
     fn hash(&self, state: &mut S) {
         (**self).hash(state);
     }
 }
+#[cfg(not(stage0))]
+impl<T: Hash> Hash for P<T> {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        (**self).hash(state);
+    }
+}
 
 impl<T: 'static + Decodable> Decodable for P<T> {
     fn decode<D: Decoder>(d: &mut D) -> Result<P<T>, D::Error> {