diff --git a/docs/config.md b/docs/config.md
index 20c5b6b984..f27e1abb13 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -546,6 +546,8 @@ Currently, the following UI feature flags are supported:
   This should only be used if the room history visibility options are managed by the server.
 * `UIFeature.TimelineEnableRelativeDates` - Display relative date separators (eg: 'Today', 'Yesterday') in the
   timeline for recent messages. When false day dates will be used.
+* `UIFeature.BulkUnverifiedSessionsReminder` - Display popup reminders to verify or remove unverified sessions. Defaults
+  to true.
 
 ## Undocumented / developer options