diff --git a/assets/themes/grb/grb.json b/assets/themes/grb/grb.json
index e8115eeac..94ea7fb73 100644
--- a/assets/themes/grb/grb.json
+++ b/assets/themes/grb/grb.json
@@ -689,6 +689,30 @@
   "osmApiTileSize": 17,
   "enableCache": false,
   "popup": [
+    {
+      "id": "jozin-belgium-block",
+      "condition": "_name=Pieter Vander Vennet",
+      "dismissable": false,
+      "title":
+        {
+          "render": "Gelieve ons te contacteren"
+        }
+      ,
+      "body": [
+        {
+          "render": "Hallo Jozin-belgium,<br/>We maken ons wat zorgen over de manier waarop je gebouwen importeert."
+        },
+        {
+          "render": "Gelieve langs te komen op <a href='https://app.element.io/#/room/#osmbe-grb:matrix.org'>het matrix-chatkanaal voor de gebouwen-import</a>, we kunnen dan bespreken hoe het beter kan."
+        },
+        {
+          "render": "(PS: Omdat je geen antwoord geeft op de changeset comments en directe berichten, contacteren we je langs dit kanaal.)"
+        },
+        {
+          "render": "Mvg, Pietervdvn (MapComplete ontwikkelaar) namens midgard, djsa, Joost Schouppe, dentonny, abstract"
+        }
+      ]
+    },
     {
       "id": "wikilink-needed",
       "condition": "_description!~.*https://wiki.openstreetmap.org/wiki/WikiProject_Belgium/Building_and_address_import.*",