diff --git a/sys/netpfil/pf/pf_ioctl.c b/sys/netpfil/pf/pf_ioctl.c
index cfd583325cd..a216ee0aa64 100644
--- a/sys/netpfil/pf/pf_ioctl.c
+++ b/sys/netpfil/pf/pf_ioctl.c
@@ -3752,7 +3752,7 @@ DIOCCHANGEADDR_error:
 
 		nr = 0;
 
-		p = pstore = malloc(psn->psn_len, M_TEMP, M_WAITOK);
+		p = pstore = malloc(psn->psn_len, M_TEMP, M_WAITOK | M_ZERO);
 		for (i = 0, sh = V_pf_srchash; i <= pf_srchashmask;
 		    i++, sh++) {
 		    PF_HASHROW_LOCK(sh);