diff --git a/OneLoneCoder_PGE_ExtensionTestGFX2D.cpp b/OneLoneCoder_PGE_ExtensionTestGFX2D.cpp
index 4e4c8ac..c54237a 100644
--- a/OneLoneCoder_PGE_ExtensionTestGFX2D.cpp
+++ b/OneLoneCoder_PGE_ExtensionTestGFX2D.cpp
@@ -46,10 +46,11 @@
 
 	Author
 	~~~~~~
-	David Barr, aka javidx9, ©OneLoneCoder 2018
+	David Barr, aka javidx9, ©OneLoneCoder 2018
 */
 
 // Include the olcPixelGameEngine
+#define OLC_PGE_APPLICATION
 #include "olcPixelGameEngine.h"
 
 // To use an extension, just include it
@@ -180,4 +181,4 @@ int main()
 		demo.Start();
 
 	return 0;
-}
\ No newline at end of file
+}