diff --git a/src/maybe_uninit.rs b/src/maybe_uninit.rs
index 39c6366..9ed1f6a 100644
--- a/src/maybe_uninit.rs
+++ b/src/maybe_uninit.rs
@@ -6,7 +6,6 @@ use std::mem::ManuallyDrop;
 /// A combination of ManuallyDrop and “maybe uninitialized”;
 /// this wraps a value that can be wholly or partially uninitialized;
 /// it also has no drop regardless of the type of T.
-#[derive(Copy)]
 #[repr(C)] // for cast from self ptr to value
 pub union MaybeUninit<T> {
     empty: (),
@@ -14,11 +13,6 @@ pub union MaybeUninit<T> {
 }
 // Why we don't use std's MaybeUninit on nightly? See the ptr method
 
-impl<T> Clone for MaybeUninit<T> where T: Copy
-{
-    fn clone(&self) -> Self { *self }
-}
-
 impl<T> MaybeUninit<T> {
     /// Create a new MaybeUninit with uninitialized interior
     pub unsafe fn uninitialized() -> Self {