diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 710bd44eaa496ab061c6ca1037663106cbc59635..9a3d9fedd7aac3de52f286c34b314d177c2c4ea6 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -935,7 +935,8 @@ int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
 	int ret = 0;
 	int pending;
 
-	if (msg->msg_flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL))
+	if (msg->msg_flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL |
+			       MSG_CMSG_COMPAT))
 		return -EOPNOTSUPP;
 
 	mutex_lock(&tls_ctx->tx_lock);