diff --git a/src/etc/inc/plugins.inc.d/dhcpd.inc b/src/etc/inc/plugins.inc.d/dhcpd.inc
index c6aea0797..fd3111cbd 100644
--- a/src/etc/inc/plugins.inc.d/dhcpd.inc
+++ b/src/etc/inc/plugins.inc.d/dhcpd.inc
@@ -1634,7 +1634,6 @@ function dhcpd_dhcrelay4_configure($verbose = false)
     }
 
     service_log('Starting DHCPv4 relay...', $verbose);
-    $ifdetails = legacy_interfaces_details();
 
     killbypid('/var/run/dhcrelay.pid');
 
@@ -1710,8 +1709,8 @@ function dhcpd_dhcrelay4_configure($verbose = false)
             }
         }
 
-        if (!empty($destif) && isset($ifdetails[$destif]) && $ifdetails[$destif]['macaddr'] == '00:00:00:00:00:00') {
-            /* explicit skip when interface has no mac address */
+        if (!empty($destif) && isset($ifconfig_details[$destif]) && $ifconfig_details[$destif]['macaddr'] == '00:00:00:00:00:00') {
+            /* explicit skip when interface has no valid mac address */
             continue;
         } elseif (!empty($destif)) {
             $dhcrelayifs[] = $destif;