diff --git a/main.cpp b/main.cpp
index 3ee25ed..e47bdaf 100644
--- a/main.cpp
+++ b/main.cpp
@@ -37,7 +37,7 @@ void loadTexture (GLuint& imageTexture1)
       cout << "loaded " << image_path << endl;
       cout << "   dim " << loaded.cols << "x" << loaded.rows << endl;
       loaded.copyTo(image(Rect(0, 0, loaded.cols, loaded.rows)));
-      //flip(image, image, 0);
+      flip(image, image, 0);
 #if (CV_VERSION_MAJOR >= 4)
       cvtColor(image, image, cv::COLOR_BGR2RGB);
 #else