diff --git a/src/obj.h b/src/obj.h
index 69dd6e51..a504b597 100644
--- a/src/obj.h
+++ b/src/obj.h
@@ -12,7 +12,7 @@ struct Function;
 class VM;
 
 typedef PyObject* (*NativeFuncC)(VM*, ArgsView);
-typedef int (*LuaStyleFuncC)(void*);
+typedef int (*LuaStyleFuncC)(VM*);
 
 struct NativeFunc {
     NativeFuncC f;