diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -584,6 +584,10 @@
 				>
 			</File>
 			<File
+				RelativePath=".\..\src\hotkeys.cpp"
+				>
+			</File>
+			<File
 				RelativePath=".\..\src\ini.cpp"
 				>
 			</File>
@@ -1060,6 +1064,10 @@
 				>
 			</File>
 			<File
+				RelativePath=".\..\src\hotkeys.h"
+				>
+			</File>
+			<File
 				RelativePath=".\..\src\house.h"
 				>
 			</File>