diff --git a/group/group.go b/group/group.go
index 1cb8f26..5f63fae 100644
--- a/group/group.go
+++ b/group/group.go
@@ -151,7 +151,7 @@ func codecFromName(name string) (webrtc.RTPCodecCapability, error) {
 	case "opus":
 		return webrtc.RTPCodecCapability{
 			"audio/opus", 48000, 2,
-			"minptime=10;useinbandfec=1",
+			"minptime=10;useinbandfec=1;stereo=1;sprop-stereo=1",
 			nil,
 		}, nil
 	case "g722":