diff --git a/src/proto/if_python3.pro b/src/proto/if_python3.pro
index 8d0489c..4e71ad2 100644
--- a/src/proto/if_python3.pro
+++ b/src/proto/if_python3.pro
@@ -1,13 +1,13 @@
 /* if_python3.c */
-int python3_enabled __ARGS((int verbose));
-void python3_end __ARGS((void));
-int python3_loaded __ARGS((void));
-void ex_py3 __ARGS((exarg_T *eap));
-void ex_py3file __ARGS((exarg_T *eap));
-void ex_py3do __ARGS((exarg_T *eap));
-void python3_buffer_free __ARGS((buf_T *buf));
-void python3_window_free __ARGS((win_T *win));
-void python3_tabpage_free __ARGS((tabpage_T *tab));
-void do_py3eval __ARGS((char_u *str, typval_T *rettv));
-int set_ref_in_python3 __ARGS((int copyID));
+int python3_enabled(int verbose);
+void python3_end(void);
+int python3_loaded(void);
+void ex_py3(exarg_T *eap);
+void ex_py3file(exarg_T *eap);
+void ex_py3do(exarg_T *eap);
+void python3_buffer_free(buf_T *buf);
+void python3_window_free(win_T *win);
+void python3_tabpage_free(tabpage_T *tab);
+void do_py3eval(char_u *str, typval_T *rettv);
+int set_ref_in_python3(int copyID);
 /* vim: set ft=c : */