1 files changed, 1 insertions, 1 deletions
diff --git a/tap.c b/tap.c
index d35d894..f971461 100644
--- a/tap.c
+++ b/tap.c
@@ -161,7 +161,7 @@ static void *tap_push_ip4h(char *buf, struct in_addr src, struct in_addr dst,
 	ip4h->protocol = proto;
 	ip4h->saddr = src.s_addr;
 	ip4h->daddr = dst.s_addr;
-	csum_ip4_header(ip4h);
+	ip4h->check = csum_ip4_header(ip4h->tot_len, proto, src, dst);
 	return ip4h + 1;
 }