diff --git a/packages/babel-core/README.md b/packages/babel-core/README.md
index 8814930519..6499ad881c 100644
--- a/packages/babel-core/README.md
+++ b/packages/babel-core/README.md
@@ -213,7 +213,7 @@ Following is a table of the options you can use:
 
 | Option                   | Default              | Description                     |
 | ------------------------ | -------------------- | ------------------------------- |
-| `ast`                    | `true`               | Include the AST in the returned object |
+| `ast`                    | `false`              | Include the AST in the returned object |
 | `auxiliaryCommentAfter`  | `null`               | Attach a comment after all non-user injected code |
 | `auxiliaryCommentBefore` | `null`               | Attach a comment before all non-user injected code |
 | `babelrc`                | `true`               | Specify whether or not to use .babelrc and .babelignore files. Not available when using the CLI, [use `--no-babelrc` instead](https://babeljs.io/docs/usage/cli/#babel-ignoring-babelrc) |