diff --git a/src/proto/if_lua.pro b/src/proto/if_lua.pro
new file mode 100644
index 0000000..fb80ae0
--- /dev/null
+++ b/src/proto/if_lua.pro
@@ -0,0 +1,8 @@
+/* if_lua.c */
+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));
+/* vim: set ft=c : */