diff --git a/src/handle.rs b/src/handle.rs
index e550fc1..80422be 100644
--- a/src/handle.rs
+++ b/src/handle.rs
@@ -34,7 +34,7 @@ impl<T: GhostHandle> AsHandle<T> for *mut Handle<T>
 }
 
 impl<'a, T: GhostHandle, U> AsHandle<T> for &'a mut U
-where &'a mut U: AsHandle<T>
+where U: AsHandle<T>
 {
     fn as_handle(&mut self) -> &mut Handle<T>
     {