diff --git a/application/core/plugins/AuthLDAP/AuthLDAP.php b/application/core/plugins/AuthLDAP/AuthLDAP.php
index 9f8dff9b213..5a15e57afbc 100644
--- a/application/core/plugins/AuthLDAP/AuthLDAP.php
+++ b/application/core/plugins/AuthLDAP/AuthLDAP.php
@@ -326,7 +326,7 @@ private function createConnection()
         }
 
         // Try to connect
-        if (str_pos($ldapserver, 'ldaps://') === false && str_pos($ldapserver, 'ldap://') === false) {
+        if (strpos($ldapserver, 'ldaps://') === false && strpos($ldapserver, 'ldap://') === false) {
             $ldapserver = 'ldap://' . $ldapserver;
         }
         $ldapconn = ldap_connect($ldapserver . ':' . (int) $ldapport);