diff --git a/serde/src/ser/impls.rs b/serde/src/ser/impls.rs
index e6adc816..d92b6266 100644
--- a/serde/src/ser/impls.rs
+++ b/serde/src/ser/impls.rs
@@ -331,6 +331,9 @@ deref_impl!(<T> Serialize for Arc<T> where T: Serialize);
 #[cfg(any(feature = "std", feature = "collections"))]
 deref_impl!(<'a, T: ?Sized> Serialize for Cow<'a, T> where T: Serialize + ToOwned);
 
+#[cfg(feature = "unstable")]
+deref_impl!(<T> Serialize for NonZero<T> where T: Serialize + Zeroable);
+
 ////////////////////////////////////////////////////////////////////////////////
 
 impl<T, E> Serialize for Result<T, E>
@@ -525,16 +528,3 @@ impl Serialize for OsString {
         self.as_os_str().serialize(serializer)
     }
 }
-
-#[cfg(feature = "unstable")]
-impl<T> Serialize for NonZero<T>
-where
-    T: Serialize + Zeroable,
-{
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: Serializer,
-    {
-        (**self).serialize(serializer)
-    }
-}