diff --git a/encoder.go b/encoder.go
index 54f9c41..b9fb199 100644
--- a/encoder.go
+++ b/encoder.go
@@ -264,13 +264,8 @@ func (e *Encoder) WriteUint128(i Uint128, order binary.ByteOrder) (err error) {
 		zlog.Debug("encode: write uint128", zap.Stringer("hex", i), zap.Uint64("lo", i.Lo), zap.Uint64("hi", i.Hi))
 	}
 	buf := make([]byte, TypeSize.Uint128)
-	if order == binary.BigEndian {
-		order.PutUint64(buf, i.Hi)
-		order.PutUint64(buf[TypeSize.Uint64:], i.Lo)
-	} else {
-		order.PutUint64(buf, i.Lo)
-		order.PutUint64(buf[TypeSize.Uint64:], i.Hi)
-	}
+	order.PutUint64(buf, i.Lo)
+	order.PutUint64(buf[TypeSize.Uint64:], i.Hi)
 	return e.toWriter(buf)
 }
 
@@ -279,13 +274,8 @@ func (e *Encoder) WriteInt128(i Int128, order binary.ByteOrder) (err error) {
 		zlog.Debug("encode: write int128", zap.Stringer("hex", i), zap.Uint64("lo", i.Lo), zap.Uint64("hi", i.Hi))
 	}
 	buf := make([]byte, TypeSize.Uint128)
-	if order == binary.BigEndian {
-		order.PutUint64(buf, i.Hi)
-		order.PutUint64(buf[TypeSize.Uint64:], i.Lo)
-	} else {
-		order.PutUint64(buf, i.Lo)
-		order.PutUint64(buf[TypeSize.Uint64:], i.Hi)
-	}
+	order.PutUint64(buf, i.Lo)
+	order.PutUint64(buf[TypeSize.Uint64:], i.Hi)
 	return e.toWriter(buf)
 }
 
diff --git a/encoder_test.go b/encoder_test.go
index 4afb5f9..e41df51 100644
--- a/encoder_test.go
+++ b/encoder_test.go
@@ -73,7 +73,6 @@ func TestEncoder_safeString(t *testing.T) {
 	assert.Equal(t, []byte{
 		0x5, 0x68, 0x65, 0x6c, 0x6c, 0x6f,
 	}, buf.Bytes())
-
 }
 
 func TestEncoder_int8(t *testing.T) {
@@ -152,7 +151,7 @@ func TestEncoder_int64(t *testing.T) {
 
 	assert.Equal(t, []byte{
 		0x91, 0x7d, 0xf3, 0xff, 0xff, 0xff, 0xff, 0xff, //-819823
-		0xe3, 0x1c, 0x1, 0x00, 0x00, 0x00, 0x00, 0x00, //72931
+		0xe3, 0x1c, 0x1, 0x00, 0x00, 0x00, 0x00, 0x00, // 72931
 	}, buf.Bytes())
 
 	// big endian
@@ -164,7 +163,7 @@ func TestEncoder_int64(t *testing.T) {
 
 	assert.Equal(t, []byte{
 		0xff, 0xff, 0xff, 0xff, 0xff, 0xf3, 0x7d, 0x91, //-819823
-		0x00, 0x00, 0x00, 0x00, 0x00, 0x1, 0x1c, 0xe3, //72931
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x1, 0x1c, 0xe3, // 72931
 	}, buf.Bytes())
 }
 
@@ -242,8 +241,8 @@ func TestEncoder_uint64(t *testing.T) {
 	enc.WriteUint64(uint64(72931), LE)
 
 	assert.Equal(t, []byte{
-		0x6f, 0x82, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, //819823
-		0xe3, 0x1c, 0x1, 0x00, 0x00, 0x00, 0x00, 0x00, //72931
+		0x6f, 0x82, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, // 819823
+		0xe3, 0x1c, 0x1, 0x00, 0x00, 0x00, 0x00, 0x00, // 72931
 	}, buf.Bytes())
 
 	// big endian
@@ -254,8 +253,8 @@ func TestEncoder_uint64(t *testing.T) {
 	enc.WriteUint64(uint64(72931), BE)
 
 	assert.Equal(t, []byte{
-		0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x82, 0x6f, //819823
-		0x00, 0x00, 0x00, 0x00, 0x00, 0x1, 0x1c, 0xe3, //72931
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x82, 0x6f, // 819823
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x1, 0x1c, 0xe3, // 72931
 	}, buf.Bytes())
 }
 
@@ -494,7 +493,6 @@ func TestEncoder_BinaryStruct(t *testing.T) {
 }
 
 func TestEncoder_BinaryTestStructWithTags(t *testing.T) {
-
 	s := &binaryTestStructWithTags{
 		F1:  "abc",
 		F2:  -75,
@@ -1115,7 +1113,6 @@ func Test_writeArrayOfUint32(t *testing.T) {
 			),
 			buf.Bytes())
 	}
-
 }
 
 func Test_writeArrayOfUint64(t *testing.T) {