diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c
index b8c9ff0645e5..e69c3d45d0f4 100644
--- a/sys/netinet/tcp_subr.c
+++ b/sys/netinet/tcp_subr.c
@@ -742,7 +742,10 @@ tcp_init(void)
 static void
 tcp_destroy(void *unused __unused)
 {
-	int error, n;
+	int n;
+#ifdef TCP_HHOOK
+	int error;
+#endif
 
 	/*
 	 * All our processes are gone, all our sockets should be cleaned