diff --git a/src/proto/gui_mac.pro b/src/proto/gui_mac.pro
index ff83759..ebe13f3 100644
--- a/src/proto/gui_mac.pro
+++ b/src/proto/gui_mac.pro
@@ -15,6 +15,7 @@
 void gui_mac_update(EventRecord *event);
 short gui_mch_get_mac_menu_item_index(vimmenu_T *menu, vimmenu_T *parent);
 int gui_mch_is_blinking(void);
+int gui_mch_is_blink_off(void);
 void gui_mch_set_blinking(long wait, long on, long off);
 void gui_mch_stop_blink(void);
 void gui_mch_start_blink(void);