diff --git a/bytesconv.go b/bytesconv.go
index e0262e7a32..d4fba6717c 100644
--- a/bytesconv.go
+++ b/bytesconv.go
@@ -296,7 +296,7 @@ func writeHexInt(w *bufio.Writer, n int) error {
 	buf := v.([]byte)
 	i := len(buf) - 1
 	for {
-		buf[i] = upperhex[n&0xf]
+		buf[i] = lowerhex[n&0xf]
 		n >>= 4
 		if n == 0 {
 			break
@@ -327,6 +327,7 @@ var hex2intTable = func() []byte {
 const (
 	toLower  = 'a' - 'A'
 	upperhex = "0123456789ABCDEF"
+	lowerhex = "0123456789abcdef"
 )
 
 var toLowerTable = func() [256]byte {
diff --git a/bytesconv_timing_test.go b/bytesconv_timing_test.go
index f817cf475b..b747181904 100644
--- a/bytesconv_timing_test.go
+++ b/bytesconv_timing_test.go
@@ -65,18 +65,6 @@ func BenchmarkAppendIPv4(b *testing.B) {
 	})
 }
 
-func BenchmarkInt2HexByte(b *testing.B) {
-	buf := []int{1, 0xf, 2, 0xd, 3, 0xe, 4, 0xa, 5, 0xb, 6, 0xc, 7, 0xf, 0, 0xf, 6, 0xd, 9, 8, 4, 0x5}
-	b.RunParallel(func(pb *testing.PB) {
-		var n int
-		for pb.Next() {
-			for _, n = range buf {
-				int2hexbyte(n)
-			}
-		}
-	})
-}
-
 func BenchmarkWriteHexInt(b *testing.B) {
 	b.RunParallel(func(pb *testing.PB) {
 		var w bytebufferpool.ByteBuffer