diff --git a/client/entities.go b/client/entities.go
index a3466466..78eee8b4 100644
--- a/client/entities.go
+++ b/client/entities.go
@@ -348,11 +348,12 @@ const (
 	Administrator MemberPermission = 2
 	Member        MemberPermission = 3
 
+	Unset        ClientProtocol = 0
 	AndroidPhone ClientProtocol = 1
-	IPad         ClientProtocol = 2
-	AndroidWatch ClientProtocol = 3
-	MacOS        ClientProtocol = 4
-	QiDian       ClientProtocol = 5
+	AndroidWatch ClientProtocol = 2
+	MacOS        ClientProtocol = 3
+	QiDian       ClientProtocol = 4
+	IPad         ClientProtocol = 5
 )
 
 func (r *UserJoinGroupRequest) Accept() {
diff --git a/client/global.go b/client/global.go
index dc9d2903..65354655 100644
--- a/client/global.go
+++ b/client/global.go
@@ -303,8 +303,6 @@ func (info *DeviceInfo) ToJson() []byte {
 		VendorOSName: string(info.VendorOSName),
 		Protocol: func() int {
 			switch info.Protocol {
-			case IPad:
-				return 0
 			case AndroidPhone:
 				return 1
 			case AndroidWatch:
@@ -313,6 +311,8 @@ func (info *DeviceInfo) ToJson() []byte {
 				return 3
 			case QiDian:
 				return 4
+			case IPad:
+				return 5
 			}
 			return 0
 		}(),
@@ -377,6 +377,8 @@ func (info *DeviceInfo) ReadJson(d []byte) error {
 		info.Protocol = MacOS
 	case 4:
 		info.Protocol = QiDian
+	case 5:
+		info.Protocol = IPad
 	default:
 		info.Protocol = IPad
 	}