--- a/openttd_vs80.vcproj	Thu Oct 05 01:43:49 2006 +0000
+++ b/openttd_vs80.vcproj	Thu Oct 05 02:26:27 2006 +0000
@@ -856,6 +856,10 @@
 			Filter="h;hpp;hxx;hm;inl"
 			>
 			<File
+				RelativePath=".\aircraft.h"
+				>
+			</File>
+			<File
 				RelativePath=".\airport.h"
 				>
 			</File>