--- hexchat-git-180317.old/src/fe-gtk/maingui.c
+++ hexchat-git-180317/src/fe-gtk/maingui.c
@@ -1563,8 +1563,10 @@
 			menu_addconnectmenu (sess->server, menu);
 	}
 
+#ifdef NOTDEF
 	mg_create_icon_item (_("_Detach"), GTK_STOCK_REDO, menu,
 								mg_detach_tab_cb, ch);
+#endif
 	mg_create_icon_item (_("_Close"), GTK_STOCK_CLOSE, menu,
 								mg_destroy_tab_cb, ch);
 	if (sess && tabmenu_list)