diff --git a/nixos/modules/services/monitoring/grafana.nix b/nixos/modules/services/monitoring/grafana.nix
index 5061666f57ce..9a9a0ab75532 100644
--- a/nixos/modules/services/monitoring/grafana.nix
+++ b/nixos/modules/services/monitoring/grafana.nix
@@ -555,7 +555,7 @@ in {
             auto_assign_org_role = mkOption {
               description = lib.mdDoc "Default role new users will be auto assigned.";
               default = "Viewer";
-              type = types.enum ["Viewer" "Editor"];
+              type = types.enum ["Viewer" "Editor" "Admin"];
             };
           };