diff --git a/fern/products/sdks/generators/typescript/configuration.mdx b/fern/products/sdks/generators/typescript/configuration.mdx
index 71084cadd..b9c61f597 100644
--- a/fern/products/sdks/generators/typescript/configuration.mdx
+++ b/fern/products/sdks/generators/typescript/configuration.mdx
@@ -28,6 +28,20 @@ See [TypeScript serde layer](/learn/sdks/generators/typescript/serde-layer) for
 Overrides the API-wide [`api.settings.auto-generate-idempotency-key`](/learn/sdks/reference/generators-yml#settings) for this SDK. Set `true` to attach an [idempotency-key header](/learn/sdks/deep-dives/idempotency#auto-generate-idempotency-keys) to eligible requests (`POST` and `PUT` by default) unless the caller provides one, or `false` to opt this SDK out when auto-generation is enabled API-wide. Pass an object to customize `header-name` and `methods`.
 </ParamField>
 
+<ParamField path="deepObjectMapQueryParameters" type="boolean" default="false" toc={true}>
+When enabled, map-typed query parameters (an OpenAPI `type: object` schema with `additionalProperties`) are encoded in OpenAPI `deepObject` style, with one key per map entry, instead of being JSON-stringified into a single value. Enable this when the server declares the parameter with `style: deepObject`.
+
+```text
+# deepObjectMapQueryParameters: false
+?metadata=%7B%22env%22%3A%22prod%22%7D
+
+# deepObjectMapQueryParameters: true
+?metadata[env]=prod
+```
+
+Maps with primitive values are passed through as-is. Maps with object, nested map, list, or date values are serialized through the [serde layer](/learn/sdks/generators/typescript/serde-layer) first when `noSerdeLayer: false`, so nested keys use their wire names and dates become ISO strings (`?metadata[env][display_name]=prod&metadata[env][created_at]=2026-09-04T00:00:00.000Z`). With `noSerdeLayer: true`, these values are passed through unchanged.
+</ParamField>
+
 <ParamField path="defaultTimeout" type="number | 'infinity'" toc={true}>
 The default timeout for network requests, in milliseconds. Set to `'infinity'` to disable the timeout. In the generated client, this can be overridden at the request level.
 </ParamField>