diff --git a/include/winuser.h b/include/winuser.h
index 260024d7e91..898c9034e33 100644
--- a/include/winuser.h
+++ b/include/winuser.h
@@ -3256,6 +3256,7 @@ typedef struct
 #define EVENT_OBJECT_HELPCHANGE        0x8010
 #define EVENT_OBJECT_DEFACTIONCHANGE   0x8011
 #define EVENT_OBJECT_ACCELERATORCHANGE 0x8012
+#define EVENT_OBJECT_INVOKED           0x8013
 
 /* Sound events */
 #define SOUND_SYSTEM_STARTUP      1