--- a/src/newgrf.h	Tue Feb 12 14:20:55 2008 +0000
+++ b/src/newgrf.h	Tue Feb 12 15:43:10 2008 +0000
@@ -126,5 +126,6 @@
 void CDECL grfmsg(int severity, const char *str, ...);
 
 bool HasGrfMiscBit(GrfMiscBit bit);
+bool GetGlobalVariable(byte param, uint32 *value);
 
 #endif /* NEWGRF_H */