diff --git a/sys/netpfil/pf/pf_nl.c b/sys/netpfil/pf/pf_nl.c
--- a/sys/netpfil/pf/pf_nl.c
+++ b/sys/netpfil/pf/pf_nl.c
@@ -363,7 +363,7 @@
 
 	bzero(creators, sizeof(creators));
 
-	for (int i = 0; i < V_pf_hashmask; i++) {
+	for (int i = 0; i <= V_pf_hashmask; i++) {
 		struct pf_idhash *ih = &V_pf_idhash[i];
 		struct pf_kstate *s;