diff --git a/instances/heimdall/configuration.nix b/instances/heimdall/configuration.nix
index e3daa46..f41a7a3 100644
--- a/instances/heimdall/configuration.nix
+++ b/instances/heimdall/configuration.nix
@@ -77,7 +77,7 @@ in
       listeners = [{
         address = "127.0.0.1";
         port = 1883;
-        users.iotdevice = {
+        users.zigbee2mqtt = {
           acl = [ "pattern readwrite #" ];
           omitPasswordAuth = true;
         };