diff --git a/library/core/src/ffi/mod.rs b/library/core/src/ffi/mod.rs
index 5a36ad121cb6a..32a35f6de6bb3 100644
--- a/library/core/src/ffi/mod.rs
+++ b/library/core/src/ffi/mod.rs
@@ -18,7 +18,6 @@ pub use self::c_str::FromBytesUntilNulError;
 #[doc(inline)]
 #[stable(feature = "core_c_str", since = "1.64.0")]
 pub use self::c_str::FromBytesWithNulError;
-use crate::fmt;
 
 #[stable(feature = "c_str_module", since = "1.88.0")]
 pub mod c_str;
@@ -48,6 +47,7 @@ pub use self::primitives::{c_ptrdiff_t, c_size_t, c_ssize_t};
 #[lang = "c_void"]
 #[repr(u8)]
 #[stable(feature = "core_c_void", since = "1.30.0")]
+#[allow(missing_debug_implementations)]
 pub enum c_void {
     #[unstable(
         feature = "c_void_variant",
@@ -65,13 +65,6 @@ pub enum c_void {
     __variant2,
 }
 
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl fmt::Debug for c_void {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("c_void").finish()
-    }
-}
-
 // Link the MSVC default lib
 #[cfg(all(windows, target_env = "msvc"))]
 #[link(