diff --git a/machines/gerd/services/matrix/housecleaning.nix b/machines/gerd/services/matrix/housecleaning.nix
index 7285ac2..e1cc434 100644
--- a/machines/gerd/services/matrix/housecleaning.nix
+++ b/machines/gerd/services/matrix/housecleaning.nix
@@ -17,7 +17,7 @@
 
   # vacuum database
   systemd.services."matrix-synapse-psql-vacuum" = let
-    psqlUser = config.systemd.services.postgresql.serviceConfig.user;
+    psqlUser = config.systemd.services.postgresql.serviceConfig.User;
     dbName = config.services.matrix-synapse.settings.database.args.database;
   in {
     serviceConfig = {