diff --git a/src/libcore/clone.rs b/src/libcore/clone.rs
index d6d3bf9950528..8856d0b8cb9de 100644
--- a/src/libcore/clone.rs
+++ b/src/libcore/clone.rs
@@ -165,6 +165,7 @@ clone_impl! { u128 }
 clone_impl! { f32 }
 clone_impl! { f64 }
 
+clone_impl! { ! }
 clone_impl! { () }
 clone_impl! { bool }
 clone_impl! { char }