diff -up xchat-2.8.6/src/fe-gtk/gtkutil.c.mnemonic xchat-2.8.6/src/fe-gtk/gtkutil.c
--- xchat-2.8.6/src/fe-gtk/gtkutil.c.mnemonic	2009-07-15 20:41:23.080340947 -0400
+++ xchat-2.8.6/src/fe-gtk/gtkutil.c	2009-07-15 20:41:48.181069489 -0400
@@ -376,6 +376,7 @@ gtkutil_button (GtkWidget *box, char *st
 	{
 		gtk_button_set_label (GTK_BUTTON (wid), labeltext);
 		gtk_button_set_image (GTK_BUTTON (wid), gtk_image_new_from_stock (stock, GTK_ICON_SIZE_MENU));
+		gtk_label_set_use_underline (GTK_BUTTON (wid), TRUE);
 		if (box)
 			gtk_container_add (GTK_CONTAINER (box), wid);
 	}