diff --git a/sys/netpfil/pf/pf.c b/sys/netpfil/pf/pf.c
--- a/sys/netpfil/pf/pf.c
+++ b/sys/netpfil/pf/pf.c
@@ -8855,7 +8855,9 @@
 	u_short			 action, reason = 0;
 	struct mbuf		*m = *m0;
 	struct ip		*h = NULL;
+#ifdef INET6
 	struct ip6_hdr		*h6 = NULL;
+#endif
 	struct m_tag		*mtag;
 	struct pf_krule		*a = NULL, *r = &V_pf_default_rule;
 	struct pf_kstate	*s = NULL;