diff --git a/data/event-schemas/schema/components/sdp_stream_metadata.yaml b/data/event-schemas/schema/components/sdp_stream_metadata.yaml
index ff5904cb..35566abe 100644
--- a/data/event-schemas/schema/components/sdp_stream_metadata.yaml
+++ b/data/event-schemas/schema/components/sdp_stream_metadata.yaml
@@ -29,11 +29,13 @@ additionalProperties:
         Whether the audio track in the stream is muted.
 
         Defaults to `false` if not present.
+      x-addedInMatrixVersion: "1.11"        
     video_muted:
       type: boolean
       description: |-
         Whether the video track in the stream is muted.
 
         Defaults to `false` if not present.
+      x-addedInMatrixVersion: "1.11"        
   required:
   - purpose
diff --git a/data/event-schemas/schema/m.call.sdp_stream_metadata_changed.yaml b/data/event-schemas/schema/m.call.sdp_stream_metadata_changed.yaml
index 98209817..953817c2 100644
--- a/data/event-schemas/schema/m.call.sdp_stream_metadata_changed.yaml
+++ b/data/event-schemas/schema/m.call.sdp_stream_metadata_changed.yaml
@@ -1,5 +1,5 @@
 type: object
-x-addedInMatrixVersion: "1.10"
+x-addedInMatrixVersion: "1.11"
 description: |-
   This event is sent by callers when they wish to update a stream's metadata
   but no negotiation is required.