diff --git a/[refs] b/[refs]
index 4f8827442d93..9e78b7a70594 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 64474bdd07f673cc48509ea0375274422c8f73bf
+refs/heads/master: e3f0dadb2b44746f6223ce4560406d19e02fb1cc
diff --git a/trunk/fs/cifs/transport.c b/trunk/fs/cifs/transport.c
index b8c5e2eb43d0..fbc5aace54b1 100644
--- a/trunk/fs/cifs/transport.c
+++ b/trunk/fs/cifs/transport.c
@@ -359,6 +359,10 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
 	if (rc)
 		return rc;
 
+	/* enable signing if server requires it */
+	if (server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
+		in_buf->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+
 	mutex_lock(&server->srv_mutex);
 	mid = AllocMidQEntry(in_buf, server);
 	if (mid == NULL) {