diff --git a/cmd/demo-signal-client/main.go b/cmd/demo-signal-client/main.go
index 7d78d4b..61f5f46 100644
--- a/cmd/demo-signal-client/main.go
+++ b/cmd/demo-signal-client/main.go
@@ -286,8 +286,11 @@ func (client *SignalClient) OnDiscoverResponse(ctx context.Context, stream proto
 	}
 	peerConnection.SetLocalDescription(sdp)
 
+	gatherComplete := webrtc.GatheringCompletePromise(peerConnection)
+	<-gatherComplete
+
 	buffer := &bytes.Buffer{}
-	if err := json.NewEncoder(buffer).Encode(sdp); err != nil {
+	if err := json.NewEncoder(buffer).Encode(peerConnection.LocalDescription()); err != nil {
 		client.Program.Send(systemMsg(fmt.Sprint("Failed to encode offer for peer "+sender+": ", err)))
 		peerConnection.Close()
 		return