diff --git a/docs/url-params.md b/docs/url-params.md
index b2af8416..2a97a553 100644
--- a/docs/url-params.md
+++ b/docs/url-params.md
@@ -72,6 +72,7 @@ These parameters are relevant to both [widget](./embedded-standalone.md) and [st
 | `sendNotificationType`                                  | `ring` or `notification`                                                                             | No                                                                                                | No                           | Will send a "ring" or "notification" `m.rtc.notification` event if the user is the first one in the call.                                                                                                                                                                                                                                                                                           |
 | `autoLeaveWhenOthersLeft`                               | `true` or `false`                                                                                    | No, defaults to `false`                                                                           | No, defaults to `false`      | Whether the app should automatically leave the call when there is no one left in the call.                                                                                                                                                                                                                                                                                                          |
 | `waitForCallPickup`                                     | `true` or `false`                                                                                    | No, defaults to `false`                                                                           | No, defaults to `false`      | When sending a notification, show UI that the app is awaiting an answer, play a dial tone, and (in widget mode) auto-close the widget once the notification expires.                                                                                                                                                                                                                                |
+| `preferStickyEvents`                                    | `true` or `false`                                                                                    | No, defaults to `false`                                                                           | No, defaults to `false`      | Enables using sticky events to derive call membership.                                                                                                                                                                                                                                                                                                                                              |
 
 ### Widget-only parameters