diff --git a/codec/codecutil/helpers.go b/codec/codecutil/helpers.go
index 770d3790..d17fca2d 100644
--- a/codec/codecutil/helpers.go
+++ b/codec/codecutil/helpers.go
@@ -31,6 +31,7 @@ const (
 	H264SID  = 27
 	H265SID  = 36
 	MJPEGSID = 28
+	PCMSID   = 191
 	ADPCMSID = 192
 )
 
@@ -43,9 +44,11 @@ func SIDToMIMEType(id int) (string, error) {
 		return "video/h265", nil
 	case MJPEGSID:
 		return "video/x-motion-jpeg", nil
+	case PCMSID:
+		return "audio/pcm", nil
 	case ADPCMSID:
 		return "audio/adpcm", nil
 	default:
-		return "", errors.New("unkown stream ID")
+		return "", errors.New("unknown stream ID")
 	}
 }