1 files changed, 7 insertions, 0 deletions
diff --git a/docs/admin_api/rooms.md b/docs/admin_api/rooms.md
index 8e3a367e90..bfc2cd4376 100644
--- a/docs/admin_api/rooms.md
+++ b/docs/admin_api/rooms.md
@@ -385,6 +385,13 @@ The API is:
 GET /_synapse/admin/v1/rooms/<room_id>/state
 ```
 
+**Parameters**
+
+The following query parameter is available:
+
+* `type` - The type of room state event to filter by, eg "m.room.create". If provided, only state events
+    of this type will be returned (regardless of their `state_key` value).
+
 A response body like the following is returned:
 
 ```json