diff --git a/src/lib.rs b/src/lib.rs
index b331947..ded1683 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,7 +14,10 @@
 
 #[repr(u8)]
 pub enum c_void {
+    // Two dummy variants so the #[repr] attribute can be used
+    #[doc(hidden)]
     __variant1,
+    #[doc(hidden)]
     __variant2,
 }