diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index c83938b..f745095 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -578,7 +578,7 @@
 	struct tcphdr *th = skb->h.th;
 	struct {
 		struct tcphdr th;
-		u32 tsopt[3];
+		u32 tsopt[TCPOLEN_TSTAMP_ALIGNED >> 2];
 	} rep;
 	struct ip_reply_arg arg;