diff --git a/docs/api-guide/schemas.md b/docs/api-guide/schemas.md
index 8fa3c010c..4e05443e0 100644
--- a/docs/api-guide/schemas.md
+++ b/docs/api-guide/schemas.md
@@ -586,6 +586,7 @@ in [OpenAPI][open-api] format.
 [coreapi]: http://www.coreapi.org/
 [corejson]: http://www.coreapi.org/specification/encoding/#core-json-encoding
 [open-api]: https://openapis.org/
+[drf-openapi]: https://github.com/limdauto/drf_openapi
 [json-hyperschema]: http://json-schema.org/latest/json-schema-hypermedia.html
 [api-blueprint]: https://apiblueprint.org/
 [static-files]: https://docs.djangoproject.com/en/stable/howto/static-files/