diff --git a/pkg/rtc/participant.go b/pkg/rtc/participant.go
index a9d4d1d48..873944adf 100644
--- a/pkg/rtc/participant.go
+++ b/pkg/rtc/participant.go
@@ -1955,7 +1955,7 @@ func (p *ParticipantImpl) onSubscribedMaxQualityChange(
 
 	// normalize the codec name
 	for _, subscribedQuality := range subscribedQualities {
-		subscribedQuality.Codec = strings.ToLower(strings.TrimLeft(subscribedQuality.Codec, "video/"))
+		subscribedQuality.Codec = strings.ToLower(strings.TrimPrefix(subscribedQuality.Codec, "video/"))
 	}
 
 	subscribedQualityUpdate := &livekit.SubscribedQualityUpdate{