--- a/src/sound.cpp	Sun Apr 15 00:17:57 2007 +0000
+++ b/src/sound.cpp	Sun Apr 15 00:23:24 2007 +0000
@@ -5,6 +5,7 @@
 #include "stdafx.h"
 #include "openttd.h"
 #include "functions.h"
+#include "landscape.h"
 #include "map.h"
 #include "mixer.h"
 #include "sound.h"