diff --git a/net/core/sock.c b/net/core/sock.c
index f5bb89785e47..f00902c532cc 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -700,6 +700,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 		break;
 	case SO_DONTROUTE:
 		sock_valbool_flag(sk, SOCK_LOCALROUTE, valbool);
+		sk_dst_reset(sk);
 		break;
 	case SO_BROADCAST:
 		sock_valbool_flag(sk, SOCK_BROADCAST, valbool);