diff --git a/src/etc/rc.newwanip b/src/etc/rc.newwanip
index c7c3ad656..19fbb6dae 100755
--- a/src/etc/rc.newwanip
+++ b/src/etc/rc.newwanip
@@ -164,8 +164,8 @@ if (!is_ipaddr($cacheip) || $ip != $cacheip || !is_ipaddr($configip)) {
         mwexec('/sbin/pfctl -Fs');
     } else if (is_ipaddr($cacheip) && $ip != $cacheip) {
         log_error("IP address change detected, killing states of old ip $cacheip");
-        mwexecf('/sbin/pfctl -k 0.0.0.0/0 -k %s', $cacheip);
-        mwexecf('/sbin/pfctl -k %s', $cacheip);
+        mwexecf('/sbin/pfctl -i %s -k 0.0.0.0/0 -k %s/32', [$interface_real, $cacheip]);
+        mwexecf('/sbin/pfctl -i %s -k %s/32 -k 0.0.0.0/0', [$interface_real, $cacheip]);
     }
 
     if (is_ipaddr($ip)) {