--- a/rail.h	Mon May 22 10:08:23 2006 +0000
+++ b/rail.h	Mon May 22 14:41:20 2006 +0000
@@ -127,7 +127,7 @@
 	byte custom_ground_offset;
 } RailtypeInfo;
 
-extern const RailtypeInfo _railtypes[RAILTYPE_END];
+extern RailtypeInfo _railtypes[RAILTYPE_END];
 
 // these are the maximums used for updating signal blocks, and checking if a depot is in a pbs block
 enum {