diff -r d9ec5ed630ff -r ba0f18cfc795 projects/openttd_vs90.vcproj
--- a/projects/openttd_vs90.vcproj	Thu May 08 13:21:55 2008 +0000
+++ b/projects/openttd_vs90.vcproj	Thu May 08 13:29:35 2008 +0000
@@ -1773,6 +1773,10 @@
 				>
 			</File>
 			<File
+				RelativePath=".\..\src\tree_gui.cpp"
+				>
+			</File>
+			<File
 				RelativePath=".\..\src\vehicle_gui.cpp"
 				>
 			</File>