diff --git a/src/etc/inc/interfaces.inc b/src/etc/inc/interfaces.inc
index e746e83a90..d50aab8762 100644
--- a/src/etc/inc/interfaces.inc
+++ b/src/etc/inc/interfaces.inc
@@ -4530,7 +4530,7 @@ initial-interval 1;
 	script "/usr/local/sbin/pfSense-dhclient-script";
 EOD;
 
-	if (is_ipaddrv4($wancfg['dhcprejectfrom'])) {
+	if (validate_ipv4_list($wancfg['dhcprejectfrom'])) {
 		$dhclientconf .= <<<EOD
 
 	reject {$wancfg['dhcprejectfrom']};