diff --git a/olcPixelGameEngine.h b/olcPixelGameEngine.h
index b4b1b92..a474b06 100644
--- a/olcPixelGameEngine.h
+++ b/olcPixelGameEngine.h
@@ -418,7 +418,9 @@ int main()
 	#define olcT(s) s
 #endif
 
-#define UNUSED(x) (void)(x)
+#if ! defined(UNUSED)
+  #define UNUSED(x) (void)(x)
+#endif
 
 // O------------------------------------------------------------------------------O
 // | PLATFORM SELECTION CODE, Thanks slavka!                                      |