---
title: MARKLESS_STORAGE_KEY_STATIC
description: "storage() gets a key or fallback that is not a string literal."
sidebar: { hidden: true }
search: { keywords: ["STORAGE_KEY_STATIC","storage key static","markless error"] }
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---

**Error** from the compiler, while it builds your `.tsrx` files.

## What happened

Markless reads the `storage()` key and fallback when it builds your code. So both must be string literals.

Markless prints the message, the reason, and a suggestion:

```text
MARKLESS_STORAGE_KEY_STATIC: storage(key, fallback) requires an explicit key to be a static string literal; omit it to derive markless:<identifier>.
The compiler bakes the key into a stable graph identity and storage key at compile time; it cannot be a runtime value.
Pass a string literal, for example `storage('theme', 'light')`, or omit the key: `storage('light')`.
https://markless.dev/errors/MARKLESS_STORAGE_KEY_STATIC
```

Words in angle brackets change from case to case.

## How to fix it

Pass string literals, like `storage('theme', 'light')`. Or leave out the key: `storage('light')`.

## Where it comes from

`@markless/compiler` raises this code. Source:

- [packages/compiler/src/passes/semantic-graph/diagnostics.ts](https://github.com/compiled-run/markless/blob/main/packages/compiler/src/passes/semantic-graph/diagnostics.ts)

Read [how to read a Markless error](/tooling/diagnostics), or go back to [all error codes](/errors).