diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index bc2d5f7..519bd24 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -289,8 +289,8 @@
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 	/* Optimize this! */
-	int truesize = tcp_win_from_space(skb->truesize)/2;
-	int window = tcp_win_from_space(sysctl_tcp_rmem[2])/2;
+	int truesize = tcp_win_from_space(skb->truesize) >> 1;
+	int window = tcp_win_from_space(sysctl_tcp_rmem[2]) >> 1;
 
 	while (tp->rcv_ssthresh <= window) {
 		if (truesize <= skb->len)