diff --git a/src/structs.h b/src/structs.h
index 3b51e0c..6d77deb 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -4333,7 +4333,7 @@
     HMENU	submenu_id;	    // If this is submenu, add children here
     HWND	tearoff_handle;	    // hWnd of tearoff if created
 #endif
-#if FEAT_GUI_HAIKU
+#ifdef FEAT_GUI_HAIKU
     BMenuItem  *id;		    // Id of menu item
     BMenu  *submenu_id;		    // If this is submenu, add children here
 # ifdef FEAT_TOOLBAR