diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h
index 96353f3df53..4d426943fd4 100644
--- a/sys/netinet/tcp_var.h
+++ b/sys/netinet/tcp_var.h
@@ -639,7 +639,6 @@ int	 tcp_ctloutput(struct socket *, struct sockopt *);
 struct tcpcb *
 	 tcp_drop(struct tcpcb *, int);
 void	 tcp_drain(void);
-void	 tcp_fasttimo(void);
 void	 tcp_init(void);
 #ifdef VIMAGE
 void	 tcp_destroy(void);
diff --git a/sys/netinet6/in6_proto.c b/sys/netinet6/in6_proto.c
index c31743f0f66..40acb1e38b9 100644
--- a/sys/netinet6/in6_proto.c
+++ b/sys/netinet6/in6_proto.c
@@ -173,7 +173,6 @@ struct ip6protosw inet6sw[] = {
 	.pr_ctloutput =		tcp_ctloutput,
 #ifndef INET	/* don't call initialization and timeout routines twice */
 	.pr_init =		tcp_init,
-	.pr_fasttimo =		tcp_fasttimo,
 	.pr_slowtimo =		tcp_slowtimo,
 #endif
 	.pr_drain =		tcp_drain,