diff --git a/unix/gtkdlg.c b/unix/gtkdlg.c
index d48c422e..ae2a4bc5 100644
--- a/unix/gtkdlg.c
+++ b/unix/gtkdlg.c
@@ -341,7 +341,7 @@ void dlg_listbox_addwithindex(union control *ctrl, void *dlg,
 	 * are tabs in the thing.
 	 */
 	GtkWidget *listitem = gtk_list_item_new();
-	GtkWidget *cols = columns_new(0);
+	GtkWidget *cols = columns_new(10);
 	gint *percents;
 	int i, ncols;