diff --git a/container/mts/mpegts.go b/container/mts/mpegts.go
index 02634fe2..f47e78ba 100644
--- a/container/mts/mpegts.go
+++ b/container/mts/mpegts.go
@@ -175,7 +175,7 @@ func FindPat(d []byte) ([]byte, int, error) {
 // is found, then it is returned along with its index, otherwise nil, -1 and an error is returned.
 func FindPid(d []byte, pid uint16) (pkt []byte, i int, err error) {
 	if len(d) < PacketSize {
-		return nil, -1, errors.New("Mpegts data not of valid length")
+		return nil, -1, errors.New("MPEGTS data not of valid length")
 	}
 	for i = 0; i < len(d); i += PacketSize {
 		p := (uint16(d[i+1]&0x1f) << 8) | uint16(d[i+2])