diff --git a/krebs/3modules/power-action.nix b/krebs/3modules/power-action.nix
index 78f2b8ebd..71e2b541a 100644
--- a/krebs/3modules/power-action.nix
+++ b/krebs/3modules/power-action.nix
@@ -16,7 +16,7 @@ let
       default = "BAT0";
     };
     user = mkOption {
-      type = types.string;
+      type = types.str;
       default = "power-action";
     };
     startAt = mkOption {