diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index fda1635dd133..7d84d94fa827 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1643,6 +1643,8 @@ static int nfs4_validate_mount_data(void *options,
 		if (nfs_parse_mount_options((char *)options, args) == 0)
 			return -EINVAL;
 
+		if (args->nfs_server.address.sin_port == 0)
+			args->nfs_server.address.sin_port = htons(NFS_PORT);
 		if (!nfs_verify_server_address((struct sockaddr *)
 						&args->nfs_server.address))
 			return -EINVAL;