diff --git a/lam/lib/export.inc b/lam/lib/export.inc
index 83a5145d..58df28b0 100755
--- a/lam/lib/export.inc
+++ b/lam/lib/export.inc
@@ -259,6 +259,7 @@ class PlaLdapExporter extends PlaAbstractExporter{
   var $queryFilter;
   var $hasNext;
   var $attributes;
+  var $ds;
   /**
    * Create a PlaLdapExporter object.
    * @param String $queryFilter the queryFilter for the export