diff --git a/website/docs/usage/v2-1.md b/website/docs/usage/v2-1.md
index be3159a56..f97d9d283 100644
--- a/website/docs/usage/v2-1.md
+++ b/website/docs/usage/v2-1.md
@@ -249,6 +249,9 @@ if all of your models are up to date, you can run the
   + sentence_splitter = nlp.create_pipe("sentencizer")
   ```
 
+- The `is_sent_start` attribute of the first token in a `Doc` now correctly
+  defaults to `True`. It previously defaulted to `None`.
+
 - The keyword argument `n_threads` on the `.pipe` methods is now deprecated, as
   the v2.x models cannot release the global interpreter lock. (Future versions
   may introduce a `n_process` argument for parallel inference via