diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index aca19d95..6053bff4 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -1567,7 +1567,7 @@ bool CPhoneDevice::OnImageReady(cv::Mat& mat)
     textSize = ft2->getTextSize(str, fs, -1, &baseline);
     cv::Point lt(0, mat.rows - fs - 20 * ratio);
     cv::Point lt2(0, lt.y - 2 * ratio);
-    cv::Point rb(0 + textSize.width + 2, lt2.y + textSize.height + 8 * ratio);
+    cv::Point rb(0 + textSize.width + 2 * ratio, lt2.y + textSize.height + 8 * ratio);
 
     if (rb.x > (int)width - 1)
     {