diff --git a/check-services.php b/check-services.php
index 350d4f4868..2164093170 100755
--- a/check-services.php
+++ b/check-services.php
@@ -58,7 +58,7 @@ foreach (dbFetchRows($sql, $params) as $service) {
     // Run the polling function if service is enabled and the associated device is up, "Disable ICMP Test" option is not enabled,
     // or service hostname/ip is different from associated device
     if (! $service['service_disabled'] && ($service['status'] == 1 || ($service['status'] == 0 && $service['status_reason'] === 'snmp') ||
-        $service['attrib_value'] === 'true' || ($service['service_ip'] !== $service['hostname'] &&
+        $service['attrib_value'] === 'true' || (! is_null($service['service_ip']) && $service['service_ip'] !== $service['hostname'] &&
         $service['service_ip'] !== inet6_ntop($service['ip'])))) {
         poll_service($service);
         $polled_services++;