--- a/ccdemos/realtime.cc	Thu Dec 13 00:08:11 2007 +0100
+++ b/ccdemos/realtime.cc	Fri Dec 14 00:05:54 2007 +0100
@@ -1,6 +1,7 @@
 #include <SDL.h>
 
 #include "raytracer.h"
+#include "kdtree.h"
 
 int w = 480;
 int h = 288;