diff --git a/projects/openttd_vs100.vcxproj b/projects/openttd_vs100.vcxproj
index 37f9948032..0571ef4862 100644
--- a/projects/openttd_vs100.vcxproj
+++ b/projects/openttd_vs100.vcxproj
@@ -869,6 +869,8 @@
     <ClCompile Include="..\src\saveload\town_sl.cpp" />
     <ClCompile Include="..\src\saveload\vehicle_sl.cpp" />
     <ClCompile Include="..\src\saveload\waypoint_sl.cpp" />
+    <ClInclude Include="..\src\saveload\extended_ver_sl.h" />
+    <ClCompile Include="..\src\saveload\extended_ver_sl.cpp" />
     <ClInclude Include="..\src\table\airport_defaults.h" />
     <ClInclude Include="..\src\table\airport_movement.h" />
     <ClInclude Include="..\src\table\airporttile_ids.h" />
diff --git a/projects/openttd_vs100.vcxproj.filters b/projects/openttd_vs100.vcxproj.filters
index 06800ffdaf..0b6dc573b4 100644
--- a/projects/openttd_vs100.vcxproj.filters
+++ b/projects/openttd_vs100.vcxproj.filters
@@ -1836,6 +1836,12 @@
     <ClCompile Include="..\src\saveload\waypoint_sl.cpp">
       <Filter>Save/Load handlers</Filter>
     </ClCompile>
+    <ClInclude Include="..\src\saveload\extended_ver_sl.h">
+      <Filter>Save/Load handlers</Filter>
+    </ClInclude>
+    <ClCompile Include="..\src\saveload\extended_ver_sl.cpp">
+      <Filter>Save/Load handlers</Filter>
+    </ClCompile>
     <ClInclude Include="..\src\table\airport_defaults.h">
       <Filter>Tables</Filter>
     </ClInclude>
diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
index f859fcf18a..f6b938ed7d 100644
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -2770,6 +2770,14 @@
 				RelativePath=".\..\src\saveload\waypoint_sl.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\saveload\extended_ver_sl.h"
+				>
+			</File>
+			<File
+				RelativePath=".\..\src\saveload\extended_ver_sl.cpp"
+				>
+			</File>
 		</Filter>
 		<Filter
 			Name="Tables"
diff --git a/projects/openttd_vs90.vcproj b/projects/openttd_vs90.vcproj
index 0cf6627fef..84e6fffa3c 100644
--- a/projects/openttd_vs90.vcproj
+++ b/projects/openttd_vs90.vcproj
@@ -2767,6 +2767,14 @@
 				RelativePath=".\..\src\saveload\waypoint_sl.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\saveload\extended_ver_sl.h"
+				>
+			</File>
+			<File
+				RelativePath=".\..\src\saveload\extended_ver_sl.cpp"
+				>
+			</File>
 		</Filter>
 		<Filter
 			Name="Tables"