diff --git a/include/macros.h b/include/macros.h
index b1558f1..d304614 100644
--- a/include/macros.h
+++ b/include/macros.h
@@ -28,7 +28,7 @@
 
 // global typings
 typedef unsigned long uintptr_t;
-
+// cast thru uintptr_t for integer to pointer casts
 #define INT2VOID(i) ((void *)(uintptr_t)(i))
 
 #define SCREEN_WIDTH 320