diff --git a/common/bytes.go b/common/bytes.go
index d1f5c6c995..ecbc64304a 100644
--- a/common/bytes.go
+++ b/common/bytes.go
@@ -27,7 +27,7 @@ import (
 // FromHex returns the bytes represented by the hexadecimal string s.
 // s may be prefixed with "0x".
 func FromHex(s string) []byte {
-	if has0xPrefix(s) {
+	if hexutil.Has0xPrefix(s) {
 		s = s[2:]
 	}
 	if len(s)%2 == 1 {
@@ -47,11 +47,6 @@ func CopyBytes(b []byte) (copiedBytes []byte) {
 	return
 }
 
-// has0xPrefix validates str begins with '0x' or '0X'.
-func has0xPrefix(str string) bool {
-	return len(str) >= 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X')
-}
-
 // isHexCharacter returns bool of c being a valid hexadecimal.
 func isHexCharacter(c byte) bool {
 	return ('0' <= c && c <= '9') || ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F')