diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index f2066772d0f397c545737ff0a353f7f4f81ad5fc..a75f7e94b4456eed264a8d52c460f0b6bbf72569 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -909,6 +909,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
 	       + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
 	       + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
 	       + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
+	       + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
 	       + nla_total_size(1); /* IFLA_PROTO_DOWN */
 
 }