diff --git a/include/utils/VideoMode.h b/include/utils/VideoMode.h
index ae72765..fb9e3b9 100644
--- a/include/utils/VideoMode.h
+++ b/include/utils/VideoMode.h
@@ -16,7 +16,7 @@ enum VideoMode
 inline VideoMode parse3DMode(std::string videoMode)
 {
 	// convert to lower case
-	std::transform(videoMode.begin(), videoMode.end(), videoMode.begin(), ::tolower);
+	std::transform(videoMode.begin(), videoMode.end(), videoMode.begin(), ::toupper);
 
 	if (videoMode == "3DTAB")
 	{