diff --git a/client/entities.go b/client/entities.go
index 06cb1abd..7426fbf9 100644
--- a/client/entities.go
+++ b/client/entities.go
@@ -343,11 +343,12 @@ 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 882ae371..cb1b8979 100644
--- a/client/global.go
+++ b/client/global.go
@@ -301,8 +301,6 @@ 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:
@@ -311,6 +309,8 @@ func (info *DeviceInfo) ToJson() []byte {
 				return 3
 			case QiDian:
 				return 4
+			case IPad:
+				return 5
 			}
 			return 0
 		}(),
@@ -375,6 +375,8 @@ func (info *DeviceInfo) ReadJson(d []byte) error {
 		info.Protocol = MacOS
 	case 4:
 		info.Protocol = QiDian
+	case 5:
+		info.Protocol = IPad
 	default:
 		info.Protocol = IPad
 	}