Update README.md

README.md

@@ -125,7 +125,7 @@ Before running FicTrac, you may configure your camera (frame rate, resolution, e
   <summary>Basler Pylon SDK</summary>
 
 1. Download and install the latest [Pylon SDK](https://www.baslerweb.com/en/products/software/basler-pylon-camera-software-suite/).
-2. When preparing the build files for FicTrac using Cmake, you will need to specify to use Pylon using the switch `-D PGR_USB3=ON` and depending on where you installed the SDK, you may also need to provide the SDK directory path using the switch `-D BASLER_DIR=...`. For example, for a Windows installation you would replace step 3 above with (replacing <vcpkg_root> with the path to your vcpkg root directory):
+2. When preparing the build files for FicTrac using Cmake, you will need to specify to use Pylon using the switch `-D BASLER_USB3=ON` and depending on where you installed the SDK, you may also need to provide the SDK directory path using the switch `-D BASLER_DIR=...`. For example, for a Windows installation you would replace step 3 above with (replacing <vcpkg_root> with the path to your vcpkg root directory):
 ```
 cmake -A x64 -D CMAKE_TOOLCHAIN_FILE=<vcpkg root>/scripts/buildsystems/vcpkg.cmake -D BASLER_USB3=ON -D BASLER_DIR="C:\path\to\Pylon" ..
 ```