diff --git a/stream/mts/psi/crc.go b/stream/mts/psi/crc.go
index 82736abd..a2e3fa9a 100644
--- a/stream/mts/psi/crc.go
+++ b/stream/mts/psi/crc.go
@@ -27,6 +27,7 @@ LICENSE
 package psi
 
 import (
+	"encoding/binary"
 	"hash/crc32"
 	"math/bits"
 )
@@ -41,10 +42,7 @@ func addCrc(out []byte) []byte {
 // updateCrc updates the crc of bytes slice, writing the checksum into the last four bytes.
 func updateCrc(b []byte) []byte {
 	crc32 := crc32_Update(0xffffffff, crc32_MakeTable(bits.Reverse32(crc32.IEEE)), b[1:len(b)-4])
-	b[len(b)-4] = byte(crc32 >> 24)
-	b[len(b)-3] = byte(crc32 >> 16)
-	b[len(b)-2] = byte(crc32 >> 8)
-	b[len(b)-1] = byte(crc32)
+	binary.BigEndian.PutUint32(b[len(b)-4:], crc32)
 	return b
 }