diff --git a/middleware/compress.go b/middleware/compress.go
index 3780ee5..fc0c31d 100644
--- a/middleware/compress.go
+++ b/middleware/compress.go
@@ -41,6 +41,8 @@ const (
 	DefaultCompressMinLength = 1024
 )
 
+const IgnoreCompression = -128
+
 type (
 	// Compressor compressor interface
 	Compressor interface {
diff --git a/middleware/compress_test.go b/middleware/compress_test.go
index 47f9fab..cc4f183 100644
--- a/middleware/compress_test.go
+++ b/middleware/compress_test.go
@@ -25,7 +25,6 @@ package middleware
 import (
 	"bytes"
 	"errors"
-	"math"
 	"math/rand"
 	"net/http/httptest"
 	"testing"
@@ -102,7 +101,7 @@ func TestCompressMiddleware(t *testing.T) {
 		},
 		DynamicLevel: func(c *elton.Context, bodySize int, encoding string) int {
 			// 不指定压缩级别
-			return math.MinInt
+			return IgnoreCompression
 		},
 	})
 
diff --git a/middleware/gzip.go b/middleware/gzip.go
index 342c70e..b1dbd18 100644
--- a/middleware/gzip.go
+++ b/middleware/gzip.go
@@ -26,7 +26,6 @@ import (
 	"bytes"
 	"compress/gzip"
 	"io"
-	"math"
 
 	"github.com/vicanso/elton"
 )
@@ -56,7 +55,7 @@ func (g *GzipCompressor) Accept(c *elton.Context, bodySize int) (bool, string) {
 // Compress compress data by gzip
 func (g *GzipCompressor) Compress(buf []byte, levels ...int) (*bytes.Buffer, error) {
 	level := g.getLevel()
-	if len(levels) != 0 && levels[0] != math.MinInt {
+	if len(levels) != 0 && levels[0] != IgnoreCompression {
 		level = levels[0]
 	}
 	buffer := new(bytes.Buffer)
diff --git a/middleware/gzip_test.go b/middleware/gzip_test.go
index 8889868..5a1ee8b 100644
--- a/middleware/gzip_test.go
+++ b/middleware/gzip_test.go
@@ -26,7 +26,6 @@ import (
 	"bytes"
 	"compress/gzip"
 	"io/ioutil"
-	"math"
 	"net/http/httptest"
 	"testing"
 
@@ -52,7 +51,7 @@ func TestGzipCompress(t *testing.T) {
 
 	_, err := g.Compress([]byte(originalData), 1)
 	assert.Nil(err)
-	buf, err := g.Compress([]byte(originalData), math.MinInt)
+	buf, err := g.Compress([]byte(originalData), IgnoreCompression)
 	assert.Nil(err)
 
 	r, err := gzip.NewReader(bytes.NewReader(buf.Bytes()))