diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index bf6b665..513f72e 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1909,7 +1909,7 @@
 	 */
 	if (rt->rt6i_dev == arg->dev &&
 	    !dst_metric_locked(&rt->u.dst, RTAX_MTU) &&
-	    (dst_mtu(&rt->u.dst) > arg->mtu ||
+	    (dst_mtu(&rt->u.dst) >= arg->mtu ||
 	     (dst_mtu(&rt->u.dst) < arg->mtu &&
 	      dst_mtu(&rt->u.dst) == idev->cnf.mtu6))) {
 		rt->u.dst.metrics[RTAX_MTU-1] = arg->mtu;