diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index ff6adec..313960e 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2559,7 +2559,7 @@
 	flush |= flags & TCP_FLAG_CWR;
 	flush |= (flags ^ tcp_flag_word(th2)) &
 		  ~(TCP_FLAG_CWR | TCP_FLAG_FIN | TCP_FLAG_PSH);
-	flush |= (th->ack_seq ^ th2->ack_seq) | (th->window ^ th2->window);
+	flush |= th->ack_seq ^ th2->ack_seq;
 	for (i = sizeof(*th); !flush && i < thlen; i += 4)
 		flush |= *(u32 *)((u8 *)th + i) ^
 			 *(u32 *)((u8 *)th2 + i);