diff --git a/src/proto/if_lua.pro b/src/proto/if_lua.pro
index 10395d5..c33678e 100644
--- a/src/proto/if_lua.pro
+++ b/src/proto/if_lua.pro
@@ -1,11 +1,11 @@
 /* if_lua.c */
-int lua_enabled __ARGS((int verbose));
-void lua_end __ARGS((void));
-void ex_lua __ARGS((exarg_T *eap));
-void ex_luado __ARGS((exarg_T *eap));
-void ex_luafile __ARGS((exarg_T *eap));
-void lua_buffer_free __ARGS((buf_T *buf));
-void lua_window_free __ARGS((win_T *win));
-void do_luaeval __ARGS((char_u *str, typval_T *arg, typval_T *rettv));
-int set_ref_in_lua __ARGS((int copyID));
+int lua_enabled(int verbose);
+void lua_end(void);
+void ex_lua(exarg_T *eap);
+void ex_luado(exarg_T *eap);
+void ex_luafile(exarg_T *eap);
+void lua_buffer_free(buf_T *o);
+void lua_window_free(win_T *o);
+void do_luaeval(char_u *str, typval_T *arg, typval_T *rettv);
+int set_ref_in_lua(int copyID);
 /* vim: set ft=c : */