diff --git a/include/net/tcp.h b/include/net/tcp.h
index 92049e6..d695cea 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -803,7 +803,7 @@
 		return left <= tcp_max_burst(tp);
 }
 
-static inline void tcp_minshall_update(struct tcp_sock *tp, int mss,
+static inline void tcp_minshall_update(struct tcp_sock *tp, unsigned int mss,
 				       const struct sk_buff *skb)
 {
 	if (skb->len < mss)