--- a/accel-pppd/ctrl/l2tp/l2tp.c
+++ b/accel-pppd/ctrl/l2tp/l2tp.c
@@ -852,7 +852,7 @@
 	void *sessions = conn->sessions;
 
 	conn->sessions = NULL;
-	tdestroy(sessions, (__free_fn_t)l2tp_session_free);
+	tdestroy(sessions, l2tp_session_free);
 	/* Let l2tp_session_free() handle the session counter and
 	 * the reference held by the tunnel.
 	 */