diff --git a/dissect/cstruct/cstruct.py b/dissect/cstruct/cstruct.py
index 0ace313..a3cd2a6 100644
--- a/dissect/cstruct/cstruct.py
+++ b/dissect/cstruct/cstruct.py
@@ -408,7 +408,7 @@ def _make_union(
     ) -> type[Structure]:
         return self._make_struct(name, fields, align=align, anonymous=anonymous, base=Union)
 
-    def to_stub(self, name: str = "", packed: bool = True):
+    def to_stub(self, name: str = ""):
         buffer = io.StringIO()
         indentation = ""
         if name: