diff --git a/sys/netpfil/pf/pf_ioctl.c b/sys/netpfil/pf/pf_ioctl.c
index 1395d9d69f17..cfd583325cd9 100644
--- a/sys/netpfil/pf/pf_ioctl.c
+++ b/sys/netpfil/pf/pf_ioctl.c
@@ -2169,7 +2169,7 @@ pfioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, struct thread *td
 			break;
 		}
 
-		p = pstore = malloc(ps->ps_len, M_TEMP, M_WAITOK);
+		p = pstore = malloc(ps->ps_len, M_TEMP, M_WAITOK | M_ZERO);
 		nr = 0;
 
 		for (i = 0; i <= pf_hashmask; i++) {