diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -1072,6 +1072,10 @@
 				>
 			</File>
 			<File
+				RelativePath=".\..\src\newgrf_generic.h"
+				>
+			</File>
+			<File
 				RelativePath=".\..\src\newgrf_house.h"
 				>
 			</File>
@@ -1948,6 +1952,10 @@
 				>
 			</File>
 			<File
+				RelativePath=".\..\src\newgrf_generic.cpp"
+				>
+			</File>
+			<File
 				RelativePath=".\..\src\newgrf_house.cpp"
 				>
 			</File>