diff --git a/src/error.rs b/src/error.rs
index 8b6b85a..aecaebf 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -236,9 +236,7 @@ struct TraitObject {
 }
 
 #[repr(transparent)]
-struct MessageError<M>(M)
-where
-    M: Display + Debug;
+struct MessageError<M>(M);
 
 impl<M> Debug for MessageError<M>
 where