diff --git a/sys/netpfil/pf/pf_ioctl.c b/sys/netpfil/pf/pf_ioctl.c
index a216ee0aa64a..a1b973edb557 100644
--- a/sys/netpfil/pf/pf_ioctl.c
+++ b/sys/netpfil/pf/pf_ioctl.c
@@ -2163,7 +2163,7 @@ pfioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, struct thread *td
 		struct pfsync_state	*pstore, *p;
 		int i, nr;
 
-		if (ps->ps_len == 0) {
+		if (ps->ps_len <= 0) {
 			nr = uma_zone_get_cur(V_pf_state_z);
 			ps->ps_len = sizeof(struct pfsync_state) * nr;
 			break;