diff --git a/app/registrations/resources/classes/registrations.php b/app/registrations/resources/classes/registrations.php
index 871489a945..8c63d1d18d 100644
--- a/app/registrations/resources/classes/registrations.php
+++ b/app/registrations/resources/classes/registrations.php
@@ -218,7 +218,7 @@
 										if (isset($call_id_array[1])) {
 											$agent = $row['agent'];
 											$lan_ip = $call_id_array[1];
-											if (!empty($agent) && false !== stripos($agent, 'grandstream') || false !== stripos($agent, 'ooma')) {
+											if (!empty($agent) && (false !== stripos($agent, 'grandstream') || false !== stripos($agent, 'ooma'))) {
 												$lan_ip = str_ireplace(
 													array('A','B','C','D','E','F','G','H','I','J'),
 													array('0','1','2','3','4','5','6','7','8','9'),