diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index e4ab0ac..a507c5e 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1502,7 +1502,7 @@
 				    rth->fl.iif != 0 ||
 				    dst_metric_locked(&rth->u.dst, RTAX_MTU) ||
 				    !net_eq(dev_net(rth->u.dst.dev), net) ||
-				    !rt_is_expired(rth))
+				    rt_is_expired(rth))
 					continue;
 
 				if (new_mtu < 68 || new_mtu >= old_mtu) {