diff --git a/docs/labs.md b/docs/labs.md
index 0163224cab..63331f2a7e 100644
--- a/docs/labs.md
+++ b/docs/labs.md
@@ -183,3 +183,8 @@ Enables support for creating and joining video rooms, which are persistent video
 ## Rich text in room topics (`feature_html_topic`) [In Development]
 
 Enables rendering of MD / HTML in room topics.
+
+## Exploring public spaces (`feature_exploring_public_spaces`)
+
+Enables exploring public spaces in the new search dialog. Requires the server to
+have [MSC3827](https://github.com/matrix-org/matrix-spec-proposals/pull/3827) enabled.