diff --git a/net/can/isotp.c b/net/can/isotp.c
index 4234a50..fca9d32 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -1045,7 +1045,7 @@ static int isotp_recvmsg(struct kiocb *iocb, struct socket *sock,
 	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)