diff --git a/packages/docs/src/content/docs/features/compilers.md b/packages/docs/src/content/docs/features/compilers.md
index 0bbc74eff..f175eb8a8 100644
--- a/packages/docs/src/content/docs/features/compilers.md
+++ b/packages/docs/src/content/docs/features/compilers.md
@@ -134,3 +134,38 @@ const config = {
 
 export default config;
 ```
+
+### MDX
+
+In a project with MDX, the compiler is automatically enabled when `@mdx-js/*` or
+`astro` are found in the list of dependencies
+([source code](https://github.com/webpro-nl/knip/blob/main/packages/knip/src/compilers/mdx.ts))
+. Override the MDX compiler if
+
+- The built-in "compiler" is not automatically enabled because your code doesn't
+  use the dependencies in the built-in list.
+
+  ```typescript
+  // knip.config.ts
+  import mdx from 'knip/dist/compilers/mdx';
+
+  const config: KnipConfig = {
+    // Manually enable built-in MDX compiler
+    compilers: {
+      mdx: mdx.compiler,
+    },
+  };
+  ```
+
+- The built-in "compiler" is not enough
+
+  ```typescript
+  // knip.config.ts
+  import { compile } from 'lib-that-has-the-mdx-compiler';
+
+  const config: KnipConfig = {
+    compilers: {
+      mdx: (text: string, filePath: string) => compile(text),
+    },
+  };
+  ```
diff --git a/packages/knip/src/compilers/mdx.ts b/packages/knip/src/compilers/mdx.ts
index 13ee7717b..1cd98817e 100644
--- a/packages/knip/src/compilers/mdx.ts
+++ b/packages/knip/src/compilers/mdx.ts
@@ -1,7 +1,21 @@
 import { fencedCodeBlockMatcher, importMatcher } from './compilers.js';
 import type { HasDependency } from './types.js';
 
-const condition = (hasDependency: HasDependency) => hasDependency('@mdx-js/mdx') || hasDependency('astro');
+// https://mdxjs.com/packages/
+const mdxDependencies = [
+  'astro',
+  '@mdx-js/esbuild',
+  '@mdx-js/loader',
+  '@mdx-js/mdx',
+  '@mdx-js/node-loader',
+  '@mdx-js/preact',
+  '@mdx-js/react',
+  '@mdx-js/rollup',
+  '@mdx-js/vue',
+  'remark-mdx',
+];
+
+const condition = (hasDependency: HasDependency) => mdxDependencies.some(hasDependency);
 
 const compiler = (text: string) => [...text.replace(fencedCodeBlockMatcher, '').matchAll(importMatcher)].join('\n');