--- a/src/newgrf_sound.cpp	Tue Apr 29 18:19:29 2008 +0000
+++ b/src/newgrf_sound.cpp	Tue Apr 29 21:31:29 2008 +0000
@@ -6,6 +6,7 @@
 #include "openttd.h"
 #include "oldpool.h"
 #include "engine_func.h"
+#include "engine_base.h"
 #include "newgrf_callbacks.h"
 #include "newgrf_engine.h"
 #include "newgrf_sound.h"