diff --git a/gnucash/gnome/dialog-sx-since-last-run.c b/gnucash/gnome/dialog-sx-since-last-run.c
index fd73489c28..ee5103eb12 100644
--- a/gnucash/gnome/dialog-sx-since-last-run.c
+++ b/gnucash/gnome/dialog-sx-since-last-run.c
@@ -1122,6 +1122,7 @@ close_handler (gpointer user_data)
 
     gnc_save_window_size (GNC_PREFS_GROUP_STARTUP, GTK_WINDOW(app_dialog->dialog));
     gtk_widget_destroy (app_dialog->dialog);
+    g_free (app_dialog);
 }
 
 static void