diff --git a/tine20/Addressbook/Convert/Contact/Json.php b/tine20/Addressbook/Convert/Contact/Json.php
index b586ced9ee1..ad3aeb18a3d 100644
--- a/tine20/Addressbook/Convert/Contact/Json.php
+++ b/tine20/Addressbook/Convert/Contact/Json.php
@@ -85,6 +85,14 @@ public function fromTine20RecordSet(Tinebase_Record_RecordSet $_records = NULL,
                     'last_modified_by'                                          => [
                         Tinebase_Record_Dehydrator_Strategy::DEF_FLAT               => true,
                     ],
+                    'sites'                                                     => [
+                        Tinebase_Record_Dehydrator_Strategy::DEF_FLAT               => true,
+                        Tinebase_Record_Dehydrator_Strategy::DEF_SUB_DEFINITIONS    => [
+                            Addressbook_Model_ContactSite::FLD_SITE => [
+                                Tinebase_Record_Dehydrator_Strategy::DEF_FLAT               => true,
+                            ],
+                        ],
+                    ],
                 ]
             ]);