diff --git a/api/src/Accounts/Ads.php b/api/src/Accounts/Ads.php
index 9a527f5fea..16216f6004 100644
--- a/api/src/Accounts/Ads.php
+++ b/api/src/Accounts/Ads.php
@@ -15,7 +15,7 @@ namespace EGroupware\Api\Accounts;
 
 use EGroupware\Api;
 
-require_once EGW_INCLUDE_ROOT.'vendor/adldap2/adldap2/src/adLDAP.php';
+require_once EGW_INCLUDE_ROOT.'/vendor/adldap2/adldap2/src/adLDAP.php';
 use adLDAPException;
 
 /**