diff --git a/objectnode/acl.go b/objectnode/acl.go
index d454d3092..2a87137f1 100644
--- a/objectnode/acl.go
+++ b/objectnode/acl.go
@@ -44,9 +44,8 @@ var (
 )
 
 type Grantee struct {
-	Xmlxsi      string `xml:"xmlns:xsi,attr" json:"xmlns,omitempty"`
-	Xmlns       string `xml:"xsi,attr" json:"xsi,omitempty"`
-	XsiType     string `xml:"xsi:type,attr" json:"xsi_type,omitempty"`
+	Xmlxsi      string `xml:"xmlns:xsi,attr" json:"-"`
+	XsiType     string `xml:"xsi:type,attr" json:"-"`
 	Type        string `xml:"type,attr" json:"t"`
 	Id          string `xml:"ID,omitempty" json:"i,omitempty"`
 	URI         string `xml:"URI,omitempty" json:"u,omitempty"`
@@ -68,7 +67,7 @@ type Owner struct {
 }
 
 type AccessControlPolicy struct {
-	Xmlns string            `xml:"xmlns,attr" json:"x,omitempty"`
+	Xmlns string            `xml:"xmlns,attr" json:"-"`
 	Owner Owner             `xml:"Owner,omitempty" json:"o,omitempty"`
 	Acl   AccessControlList `xml:"AccessControlList,omitempty" json:"a,omitempty"`
 }
@@ -186,7 +185,6 @@ func (acp *AccessControlPolicy) AddGrant(idUri, granteeType, permission string)
 	default:
 		return
 	}
-	g.Grantee.Xmlns = XMLNS
 	g.Permission = permission
 	acp.Acl.Grants = append(acp.Acl.Grants, g)
 }
@@ -218,15 +216,12 @@ func (acp *AccessControlPolicy) SetAuthenticatedRead(ownerId string) {
 func (acp *AccessControlPolicy) XmlMarshal() ([]byte, error) {
 	var grants []Grant
 	for _, g := range acp.Acl.Grants {
-		if g.Grantee.Xmlns == "" {
-			g.Grantee.Xmlns = XMLNS
-		}
-		g.Grantee.Xmlxsi = g.Grantee.Xmlns
+		g.Grantee.Xmlxsi = XMLSI
 		g.Grantee.XsiType = g.Grantee.Type
 		grants = append(grants, g)
 	}
 	acp.Acl.Grants = grants
-	acp.Xmlns = "http://s3.amazonaws.com/doc/2006-03-01/"
+	acp.Xmlns = XMLNS
 	data, err := xml.Marshal(acp)
 	if err != nil {
 		return nil, err
@@ -234,20 +229,7 @@ func (acp *AccessControlPolicy) XmlMarshal() ([]byte, error) {
 	return append([]byte(xml.Header), data...), nil
 }
 
-func (acp *AccessControlPolicy) RemoveAttr() {
-	var grants []Grant
-	for _, g := range acp.Acl.Grants {
-		g.Grantee.Xmlxsi = ""
-		g.Grantee.XsiType = ""
-		g.Grantee.Xmlns = ""
-		grants = append(grants, g)
-	}
-	acp.Xmlns = ""
-	acp.Acl.Grants = grants
-}
-
 func (acp *AccessControlPolicy) Encode() string {
-	acp.RemoveAttr()
 	data, err := json.Marshal(acp)
 	if err != nil {
 		log.LogWarnf("acl json marshal failed: %v", err)
diff --git a/objectnode/acl_api.go b/objectnode/acl_api.go
index 64cffa79e..801e4033f 100644
--- a/objectnode/acl_api.go
+++ b/objectnode/acl_api.go
@@ -176,7 +176,6 @@ func addGrants(acl *AccessControlPolicy, grants []grant, permission string) {
 }
 
 func putBucketACL(vol *Volume, acp *AccessControlPolicy) error {
-	acp.RemoveAttr()
 	data, err := json.Marshal(acp)
 	if err != nil {
 		return err
@@ -192,7 +191,9 @@ func getObjectACL(vol *Volume, path string, needDefault bool) (*AccessControlPol
 	var acp *AccessControlPolicy
 	data := xAttr.Get(XAttrKeyOSSACL)
 	if len(data) > 0 {
-		err = json.Unmarshal(data, &acp)
+		if err = json.Unmarshal(data, &acp); err != nil {
+			err = xml.Unmarshal(data, &acp)
+		}
 	} else if needDefault {
 		acp = CreateDefaultACL(vol.owner)
 	}
@@ -200,7 +201,6 @@ func getObjectACL(vol *Volume, path string, needDefault bool) (*AccessControlPol
 }
 
 func putObjectACL(vol *Volume, path string, acp *AccessControlPolicy) error {
-	acp.RemoveAttr()
 	data, err := json.Marshal(acp)
 	if err != nil {
 		return err
diff --git a/objectnode/acl_enum.go b/objectnode/acl_enum.go
index f59830ff5..05b11e105 100644
--- a/objectnode/acl_enum.go
+++ b/objectnode/acl_enum.go
@@ -48,7 +48,8 @@ const (
 )
 
 const (
-	XMLNS              = "http://www.w3.org/2001/XMLSchema-instance"
+	XMLNS              = "http://s3.amazonaws.com/doc/2006-03-01/"
+	XMLSI              = "http://www.w3.org/2001/XMLSchema-instance"
 	GroupAllUser       = "http://acs.amazonaws.com/groups/global/AllUsers"
 	GroupAuthenticated = "http://acs.amazonaws.com/groups/global/AuthenticatedUsers"
 )
diff --git a/objectnode/acl_test.go b/objectnode/acl_test.go
index 12b1eac94..d88e51523 100644
--- a/objectnode/acl_test.go
+++ b/objectnode/acl_test.go
@@ -58,14 +58,12 @@ func TestAccessControlPolicyXml(t *testing.T) {
 	require.Equal(t, "CanonicalUser", result.Acl.Grants[0].Grantee.Type)
 	require.Equal(t, "", result.Acl.Grants[0].Grantee.URI)
 	require.Equal(t, "display-id1-name", result.Acl.Grants[0].Grantee.DisplayName)
-	require.Equal(t, "http://www.w3.org/2001/XMLSchema-instance", result.Acl.Grants[0].Grantee.Xmlns)
 
 	require.Equal(t, "READ", result.Acl.Grants[1].Permission)
 	require.Equal(t, "", result.Acl.Grants[1].Grantee.Id)
 	require.Equal(t, "Group", result.Acl.Grants[1].Grantee.Type)
 	require.Equal(t, "http://acs.amazonaws.com/groups/global/AllUsers", result.Acl.Grants[1].Grantee.URI)
 	require.Equal(t, "", result.Acl.Grants[1].Grantee.DisplayName)
-	require.Equal(t, "http://www.w3.org/2001/XMLSchema-instance", result.Acl.Grants[1].Grantee.Xmlns)
 }
 
 func TestAccessControlPolicyXml_NoGrantIDAndURI(t *testing.T) {
@@ -244,7 +242,6 @@ func TestSetPrivate(t *testing.T) {
 	require.Equal(t, "", acp.Acl.Grants[0].Grantee.URI)
 	require.Equal(t, "", acp.Acl.Grants[0].Grantee.DisplayName)
 	require.Equal(t, "CanonicalUser", acp.Acl.Grants[0].Grantee.Type)
-	require.Equal(t, "http://www.w3.org/2001/XMLSchema-instance", acp.Acl.Grants[0].Grantee.Xmlns)
 }
 
 func TestSetPublicRead(t *testing.T) {
@@ -257,14 +254,12 @@ func TestSetPublicRead(t *testing.T) {
 	require.Equal(t, "", acp.Acl.Grants[0].Grantee.URI)
 	require.Equal(t, "", acp.Acl.Grants[0].Grantee.DisplayName)
 	require.Equal(t, "CanonicalUser", acp.Acl.Grants[0].Grantee.Type)
-	require.Equal(t, "http://www.w3.org/2001/XMLSchema-instance", acp.Acl.Grants[0].Grantee.Xmlns)
 
 	require.Equal(t, "READ", acp.Acl.Grants[1].Permission)
 	require.Equal(t, "", acp.Acl.Grants[1].Grantee.Id)
 	require.Equal(t, "http://acs.amazonaws.com/groups/global/AllUsers", acp.Acl.Grants[1].Grantee.URI)
 	require.Equal(t, "", acp.Acl.Grants[1].Grantee.DisplayName)
 	require.Equal(t, "Group", acp.Acl.Grants[1].Grantee.Type)
-	require.Equal(t, "http://www.w3.org/2001/XMLSchema-instance", acp.Acl.Grants[1].Grantee.Xmlns)
 }
 
 func TestSetPublicReadWrite(t *testing.T) {
@@ -277,21 +272,18 @@ func TestSetPublicReadWrite(t *testing.T) {
 	require.Equal(t, "", acp.Acl.Grants[0].Grantee.URI)
 	require.Equal(t, "", acp.Acl.Grants[0].Grantee.DisplayName)
 	require.Equal(t, "CanonicalUser", acp.Acl.Grants[0].Grantee.Type)
-	require.Equal(t, "http://www.w3.org/2001/XMLSchema-instance", acp.Acl.Grants[0].Grantee.Xmlns)
 
 	require.Equal(t, "READ", acp.Acl.Grants[1].Permission)
 	require.Equal(t, "", acp.Acl.Grants[1].Grantee.Id)
 	require.Equal(t, "http://acs.amazonaws.com/groups/global/AllUsers", acp.Acl.Grants[1].Grantee.URI)
 	require.Equal(t, "", acp.Acl.Grants[1].Grantee.DisplayName)
 	require.Equal(t, "Group", acp.Acl.Grants[1].Grantee.Type)
-	require.Equal(t, "http://www.w3.org/2001/XMLSchema-instance", acp.Acl.Grants[1].Grantee.Xmlns)
 
 	require.Equal(t, "WRITE", acp.Acl.Grants[2].Permission)
 	require.Equal(t, "", acp.Acl.Grants[2].Grantee.Id)
 	require.Equal(t, "http://acs.amazonaws.com/groups/global/AllUsers", acp.Acl.Grants[2].Grantee.URI)
 	require.Equal(t, "", acp.Acl.Grants[2].Grantee.DisplayName)
 	require.Equal(t, "Group", acp.Acl.Grants[2].Grantee.Type)
-	require.Equal(t, "http://www.w3.org/2001/XMLSchema-instance", acp.Acl.Grants[2].Grantee.Xmlns)
 }
 
 func TestSetAuthenticatedRead(t *testing.T) {
@@ -304,14 +296,12 @@ func TestSetAuthenticatedRead(t *testing.T) {
 	require.Equal(t, "", acp.Acl.Grants[0].Grantee.URI)
 	require.Equal(t, "", acp.Acl.Grants[0].Grantee.DisplayName)
 	require.Equal(t, "CanonicalUser", acp.Acl.Grants[0].Grantee.Type)
-	require.Equal(t, "http://www.w3.org/2001/XMLSchema-instance", acp.Acl.Grants[0].Grantee.Xmlns)
 
 	require.Equal(t, "READ", acp.Acl.Grants[1].Permission)
 	require.Equal(t, "", acp.Acl.Grants[1].Grantee.Id)
 	require.Equal(t, "http://acs.amazonaws.com/groups/global/AuthenticatedUsers", acp.Acl.Grants[1].Grantee.URI)
 	require.Equal(t, "", acp.Acl.Grants[1].Grantee.DisplayName)
 	require.Equal(t, "Group", acp.Acl.Grants[1].Grantee.Type)
-	require.Equal(t, "http://www.w3.org/2001/XMLSchema-instance", acp.Acl.Grants[1].Grantee.Xmlns)
 }
 
 func TestAccessControlPolicy_FULL_CONTROL(t *testing.T) {
diff --git a/objectnode/fs_volume.go b/objectnode/fs_volume.go
index c2e174914..ed9248dc2 100644
--- a/objectnode/fs_volume.go
+++ b/objectnode/fs_volume.go
@@ -233,6 +233,7 @@ func (v *Volume) loadBucketACL() (acp *AccessControlPolicy, err error) {
 	}
 	acp = &AccessControlPolicy{}
 	if err = json.Unmarshal(raw, acp); err != nil {
+		err = xml.Unmarshal(raw, acp)
 		return
 	}
 	return