diff --git a/binding/form_mapping.go b/binding/form_mapping.go
index 540bbbb8..dd46fb4c 100644
--- a/binding/form_mapping.go
+++ b/binding/form_mapping.go
@@ -175,6 +175,15 @@ func setByForm(value reflect.Value, field reflect.StructField, form map[string][
 		if !ok {
 			vs = []string{opt.defaultValue}
 		}
+
+		switch value.Interface().(type) {
+		case []byte:
+			if len(vs) > 0 {
+				value.Set(reflect.ValueOf([]byte(vs[0])))
+				return true, nil
+			}
+		}
+
 		return true, setSlice(vs, value, field)
 	case reflect.Array:
 		if !ok {
diff --git a/binding/form_mapping_test.go b/binding/form_mapping_test.go
index 93d6a92f..9f26cedf 100644
--- a/binding/form_mapping_test.go
+++ b/binding/form_mapping_test.go
@@ -269,6 +269,15 @@ func TestMappingStructField(t *testing.T) {
 	assert.Equal(t, 9, s.J.I)
 }
 
+func TestByteArray(t *testing.T) {
+	var s struct {
+		B []byte
+	}
+	err := mappingByPtr(&s, formSource{"B": {"hello"}}, "form")
+	assert.NoError(t, err)
+	assert.Equal(t, []byte("hello"), s.B)
+}
+
 func TestMappingMapField(t *testing.T) {
 	var s struct {
 		M map[string]int
diff --git a/binding/multipart_form_mapping.go b/binding/multipart_form_mapping.go
index 4ebe8326..d11c93aa 100644
--- a/binding/multipart_form_mapping.go
+++ b/binding/multipart_form_mapping.go
@@ -6,6 +6,7 @@ package binding
 
 import (
 	"errors"
+	"io/ioutil"
 	"mime/multipart"
 	"net/http"
 	"reflect"
@@ -14,6 +15,7 @@ import (
 type multipartRequest http.Request
 
 var _ setter = (*multipartRequest)(nil)
+var ConstructionFailure = false
 
 var (
 	// ErrMultiFileHeader multipart.FileHeader invalid
@@ -47,6 +49,27 @@ func setByMultipartFormFile(value reflect.Value, field reflect.StructField, file
 			return true, nil
 		}
 	case reflect.Slice:
+		switch value.Interface().(type) {
+		case []byte:
+			fd, err := files[0].Open()
+			if err != nil {
+				return false, err
+			}
+			defer fd.Close()
+			c, err := ioutil.ReadAll(fd)
+
+			if ConstructionFailure {
+				err = errors.New("test use")
+			}
+
+			if err != nil {
+				return false, err
+			}
+
+			value.Set(reflect.ValueOf(c))
+			return true, nil
+		}
+
 		slice := reflect.MakeSlice(value.Type(), len(files), len(files))
 		isSet, err = setArrayOfMultipartFormFiles(slice, field, files)
 		if err != nil || !isSet {
diff --git a/binding/multipart_form_mapping_test.go b/binding/multipart_form_mapping_test.go
index 4e97c0f0..c9dffb43 100644
--- a/binding/multipart_form_mapping_test.go
+++ b/binding/multipart_form_mapping_test.go
@@ -14,6 +14,55 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+func TestFormMultipartBindingOneFileToBytesFail1(t *testing.T) {
+	var test struct {
+		Voice []byte `form:"voice"`
+	}
+
+	file := testFile{"voice", "test.pcm", []byte("pcm pcm pcm")}
+	req := createRequestMultipartFiles(t, file)
+
+	err := req.ParseMultipartForm(3)
+	assert.NoError(t, err)
+
+	err = req.MultipartForm.RemoveAll()
+	assert.NoError(t, err)
+
+	err = mappingByPtr(&test, (*multipartRequest)(req), "form")
+	assert.Error(t, err)
+}
+
+func TestFormMultipartBindingOneFileToBytesFail2(t *testing.T) {
+	var test struct {
+		Voice []byte `form:"voice"`
+	}
+
+	file := testFile{"voice", "test.pcm", []byte("pcm pcm pcm")}
+	req := createRequestMultipartFiles(t, file)
+
+	ConstructionFailure = true
+
+	err := req.ParseMultipartForm(3)
+	assert.NoError(t, err)
+
+	err = mappingByPtr(&test, (*multipartRequest)(req), "form")
+	assert.Error(t, err)
+	ConstructionFailure = false
+}
+
+func TestFormMultipartBindingOneFileToBytesArray(t *testing.T) {
+	var test struct {
+		Voice []byte `form:"voice"`
+	}
+
+	file := testFile{"voice", "test.pcm", []byte("pcm pcm pcm")}
+	req := createRequestMultipartFiles(t, file)
+	err := FormMultipart.Bind(req, &test)
+	assert.NoError(t, err)
+
+	assert.Equal(t, test.Voice, []byte("pcm pcm pcm"))
+}
+
 func TestFormMultipartBindingBindOneFile(t *testing.T) {
 	var s struct {
 		FileValue   multipart.FileHeader     `form:"file"`