diff --git a/nixos/modules/services/logging/graylog.nix b/nixos/modules/services/logging/graylog.nix
index e6a23233ba2..28e2d18bf03 100644
--- a/nixos/modules/services/logging/graylog.nix
+++ b/nixos/modules/services/logging/graylog.nix
@@ -132,7 +132,7 @@ in
         description = "Graylog server daemon user";
       };
     };
-    users.groups = mkIf (cfg.user == "graylog") {};
+    users.groups = mkIf (cfg.user == "graylog") { graylog = {}; };
 
     systemd.tmpfiles.rules = [
       "d '${cfg.messageJournalDir}' - ${cfg.user} - - -"