diff --git a/openttd.vcproj b/openttd.vcproj
--- a/openttd.vcproj
+++ b/openttd.vcproj
@@ -596,6 +596,9 @@
 				RelativePath=".\rail.h">
 			</File>
 			<File
+				RelativePath=".\resize_window_widgets.h"
+			</File>
+			<File
 				RelativePath=".\saveload.h">
 			</File>
 			<File