diff --git a/client/builders.go b/client/builders.go
index 032a4f1d..ef836780 100644
--- a/client/builders.go
+++ b/client/builders.go
@@ -124,7 +124,7 @@ func (c *QQClient) buildDeviceLockLoginPacket() (uint16, []byte) {
 	return seq, c.transport.PackPacket(&req2)
 }
 
-func (c *QQClient) buildQRCodeFetchRequestPacket() (uint16, []byte) {
+func (c *QQClient) buildQRCodeFetchRequestPacket(size, margin, ecLevel uint32) (uint16, []byte) {
 	watch := auth.AndroidWatch.Version()
 	seq := c.nextSeq()
 	req := c.buildOicqRequestPacket(0, 0x0812, binary.NewWriterF(func(w *binary.Writer) {
@@ -139,7 +139,7 @@ func (c *QQClient) buildQRCodeFetchRequestPacket() (uint16, []byte) {
 
 			w.WriteUInt16(6)
 			w.Write(tlv.T16(watch.SSOVersion, 16, watch.AppId, c.deviceInfo.Guid, []byte(watch.ApkId), []byte(watch.SortVersionName), watch.ApkSign))
-			w.Write(tlv.T1B(0, 0, 3, 4, 72, 2, 2))
+			w.Write(tlv.T1B(0, 0, size, margin, 72, ecLevel, 2))
 			w.Write(tlv.T1D(watch.MiscBitmap))
 			w.Write(tlv.T1F(false, c.deviceInfo.OSType, []byte("7.1.2"), []byte("China Mobile GSM"), c.deviceInfo.APN, 2))
 			w.Write(tlv.T33(c.deviceInfo.Guid))
diff --git a/client/client.go b/client/client.go
index ef9b0391..971472b2 100644
--- a/client/client.go
+++ b/client/client.go
@@ -309,7 +309,7 @@ func (c *QQClient) TokenLogin(token []byte) error {
 	return c.init(true)
 }
 
-func (c *QQClient) FetchQRCode() (*QRCodeLoginResponse, error) {
+func (c *QQClient) FetchQRCode(size, margin, ecLevel uint32) (*QRCodeLoginResponse, error) {
 	if c.Online.Load() {
 		return nil, ErrAlreadyOnline
 	}
@@ -317,7 +317,7 @@ func (c *QQClient) FetchQRCode() (*QRCodeLoginResponse, error) {
 	if err != nil {
 		return nil, err
 	}
-	i, err := c.sendAndWait(c.buildQRCodeFetchRequestPacket())
+	i, err := c.sendAndWait(c.buildQRCodeFetchRequestPacket(size, margin, ecLevel))
 	if err != nil {
 		return nil, errors.Wrap(err, "fetch qrcode error")
 	}