diff --git a/panels/network/connection-editor/net-connection-editor.c b/panels/network/connection-editor/net-connection-editor.c
index b94144a..40be068 100644
--- a/panels/network/connection-editor/net-connection-editor.c
+++ b/panels/network/connection-editor/net-connection-editor.c
@@ -845,7 +845,7 @@ net_connection_editor_new (GtkWindow        *parent_window,
         editor = g_object_new (NET_TYPE_CONNECTION_EDITOR, NULL);
 
         if (parent_window) {
-                editor->parent_window = g_object_ref (parent_window);
+                editor->parent_window = GTK_WIDGET (g_object_ref (parent_window));
                 gtk_window_set_transient_for (GTK_WINDOW (editor->window),
                                               parent_window);
         }