diff --git a/src/lib.rs b/src/lib.rs
index b3319475e19b9c5456a106b537a97524a14c914d..ded1683d245d2b3a31c23c04ea4263a967f53991 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,
 }