--- a/projects/openttd_vs80.vcproj	Sat Jan 13 16:09:53 2007 +0000
+++ b/projects/openttd_vs80.vcproj	Sat Jan 13 16:23:24 2007 +0000
@@ -739,6 +739,9 @@
 				RelativePath=".\..\src\heightmap.h">
 			</File>
 			<File
+				RelativePath=".\..\src\helpers.hpp">
+			</File>
+			<File
 				RelativePath=".\..\src\industry.h">
 			</File>
 			<File