diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 0cbb440..b9cbc35 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2663,7 +2663,7 @@
 		       tp->snd_ssthresh, tp->prior_ssthresh,
 		       tp->packets_out);
 	}
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6)
 	else if (sk->sk_family == AF_INET6) {
 		struct ipv6_pinfo *np = inet6_sk(sk);
 		printk(KERN_DEBUG "Undo %s %pI6/%u c%u l%u ss%u/%u p%u\n",