diff --git a/docs/topics/release-notes.md b/docs/topics/release-notes.md
index 2b52caa99..ec49fb13f 100644
--- a/docs/topics/release-notes.md
+++ b/docs/topics/release-notes.md
@@ -62,6 +62,7 @@ You can determine your currently installed version using `pip freeze`:
 * Catch `APIException` from `get_serializer_fields` in schema generation. [#5443][gh5443]
 * Allow custom authentication and permission classes when using `include_docs_urls` [#5448][gh5448]
 * Defer translated string evaluation on validators. [#5452][gh5452]
+* Added default value for 'detail' param into 'ValidationError' exception [#5342][gh5342]
 
 
 
@@ -79,6 +80,7 @@ You can determine your currently installed version using `pip freeze`:
 [gh5443]: https://github.com/encode/django-rest-framework/issues/5443
 [gh5448]: https://github.com/encode/django-rest-framework/issues/5448
 [gh5452]: https://github.com/encode/django-rest-framework/issues/5452
+[gh5342]: https://github.com/encode/django-rest-framework/issues/5342
 
 
 ## 3.6.x series