diff --git a/RFXtoRP_HsrPrepa_TrackingHuLabelled.ftl b/RFXtoRP_HsrPrepa_TrackingHuLabelled.ftl
index e4b6d5c..11f78c6 100644
--- a/RFXtoRP_HsrPrepa_TrackingHuLabelled.ftl
+++ b/RFXtoRP_HsrPrepa_TrackingHuLabelled.ftl
@@ -11,13 +11,13 @@
     "ID": {
       <#switch supplyOfTheTrackingNumber>
         <#case 0>
-          "RefID":"",
+          "RefID":" ",
         <#break>
         <#case 1>
           <#if despatched_ipg.consignment_unit_id!="">
 			      "RefID": "${despatched_ipg.consignment_unit_id?trim?json_string}",
           <#else>
-            "RefID":"",
+            "RefID":" ",
           </#if>
         <#break>
         <#case 2>