1 files changed, 1 insertions, 1 deletions
diff --git a/gi/union.h b/gi/union.h
index f562af50..b46530bc 100644
--- a/gi/union.h
+++ b/gi/union.h
@@ -55,7 +55,7 @@ class UnionPrototype : public GIWrapperPrototype<UnionBase, UnionPrototype,
 
     GJS_JSAPI_RETURN_CONVENTION
     bool resolve_impl(JSContext* cx, JS::HandleObject obj, JS::HandleId id,
-                      const char* prop_name, bool* resolved);
+                      bool* resolved);
 
     // Overrides GIWrapperPrototype::constructor_nargs().
     [[nodiscard]] unsigned constructor_nargs(void) const { return 0; }