diff --git a/config/delta-producer/public/export.json b/config/delta-producer/public/export.json
index 3313615..fb0a689 100644
--- a/config/delta-producer/public/export.json
+++ b/config/delta-producer/public/export.json
@@ -540,7 +540,8 @@
       ],
       "properties": [
         "http://mu.semte.ch/vocabularies/core/uuid",
-        "http://www.w3.org/ns/org#role"
+        "http://www.w3.org/ns/org#role",
+        "http://data.vlaanderen.be/ns/mandaat#aantalHouders"
       ]
     },
     {