diff --git a/net/can/isotp.c b/net/can/isotp.c
index f6f8ba1f816d4ca9960d17121b161846b72106db..bafb0fb5f0e0ece5f8130676096381fdafc76792 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -1050,7 +1050,7 @@ static int isotp_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
 	int noblock = flags & MSG_DONTWAIT;
 	int ret = 0;
 
-	if (flags & ~(MSG_DONTWAIT | MSG_TRUNC))
+	if (flags & ~(MSG_DONTWAIT | MSG_TRUNC | MSG_PEEK))
 		return -EINVAL;
 
 	if (!so->bound)