diff --git a/src/Ltb/Ldap.php b/src/Ltb/Ldap.php
index 22afd8c..dcfa4aa 100644
--- a/src/Ltb/Ldap.php
+++ b/src/Ltb/Ldap.php
@@ -130,7 +130,7 @@ function search($ldap_filter,$attributes, $attributes_map, $search_result_title,
 
            $cookie = "";
            do {
-               $controls = null;
+               $controls = [];
                if($this->ldap_page_size != 0)
                {
                    $controls = [[