diff --git a/changelog.d/19788.doc b/changelog.d/19788.doc
new file mode 100644
index 00000000000..bfdd3a3d37c
--- /dev/null
+++ b/changelog.d/19788.doc
@@ -0,0 +1 @@
+Add stable endpoint for [MSC3266: Room summary API](https://github.com/matrix-org/matrix-spec-proposals/pull/3266) into worker docs. Contributed by @olmari.
\ No newline at end of file
diff --git a/docs/workers.md b/docs/workers.md
index 8d3aad19c66..d987ff8980f 100644
--- a/docs/workers.md
+++ b/docs/workers.md
@@ -239,6 +239,7 @@ information.
     ^/_matrix/client/(v1|unstable)/rooms/.*/relations/
     ^/_matrix/client/v1/rooms/.*/threads$
     ^/_matrix/client/unstable/im.nheko.summary/summary/.*$
+    ^/_matrix/client/v1/room_summary/.*$
     ^/_matrix/client/(r0|v3|unstable)/account/3pid$
     ^/_matrix/client/(r0|v3|unstable)/account/whoami$
     ^/_matrix/client/(r0|v3|unstable)/account/deactivate$