diff --git a/crates/ruma-macros/src/api/attribute.rs b/crates/ruma-macros/src/api/attribute.rs
index 14e9b426..f88125c3 100644
--- a/crates/ruma-macros/src/api/attribute.rs
+++ b/crates/ruma-macros/src/api/attribute.rs
@@ -15,9 +15,6 @@ mod kw {
     syn::custom_keyword!(authentication);
     syn::custom_keyword!(method);
     syn::custom_keyword!(error_ty);
-    syn::custom_keyword!(unstable);
-    syn::custom_keyword!(r0);
-    syn::custom_keyword!(stable);
     syn::custom_keyword!(manual_body_serde);
 }