diff --git a/projects/openttd_vs140.vcxproj b/projects/openttd_vs140.vcxproj
index 7ea8c7204c..ceb9c3f233 100644
--- a/projects/openttd_vs140.vcxproj
+++ b/projects/openttd_vs140.vcxproj
@@ -893,6 +893,7 @@
     <ClCompile Include="..\src\water_cmd.cpp" />
     <ClCompile Include="..\src\waypoint_cmd.cpp" />
     <ClCompile Include="..\src\zoning_cmd.cpp" />
+    <ClCompile Include="..\src\bitstream.cpp" />
     <ClInclude Include="..\src\citymania\base64.h" />
     <ClCompile Include="..\src\citymania\base64.cpp" />
     <ClInclude Include="..\src\newgrf_revisions.hpp" />
diff --git a/projects/openttd_vs140.vcxproj.filters b/projects/openttd_vs140.vcxproj.filters
index 9959d7d71b..ac4873d994 100644
--- a/projects/openttd_vs140.vcxproj.filters
+++ b/projects/openttd_vs140.vcxproj.filters
@@ -1770,6 +1770,9 @@
     <ClCompile Include="..\src\zoning_cmd.cpp">
       <Filter>Command handlers</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\bitstream.cpp">
+      <Filter>CityMania files</Filter>
+    </ClCompile>
     <ClInclude Include="..\src\citymania\base64.h">
       <Filter>CityMania files</Filter>
     </ClInclude>
diff --git a/projects/openttd_vs141.vcxproj b/projects/openttd_vs141.vcxproj
index 33e7ffa3d7..b38b801139 100644
--- a/projects/openttd_vs141.vcxproj
+++ b/projects/openttd_vs141.vcxproj
@@ -893,6 +893,7 @@
     <ClCompile Include="..\src\water_cmd.cpp" />
     <ClCompile Include="..\src\waypoint_cmd.cpp" />
     <ClCompile Include="..\src\zoning_cmd.cpp" />
+    <ClCompile Include="..\src\bitstream.cpp" />
     <ClInclude Include="..\src\citymania\base64.h" />
     <ClCompile Include="..\src\citymania\base64.cpp" />
     <ClInclude Include="..\src\newgrf_revisions.hpp" />
diff --git a/projects/openttd_vs141.vcxproj.filters b/projects/openttd_vs141.vcxproj.filters
index 9959d7d71b..ac4873d994 100644
--- a/projects/openttd_vs141.vcxproj.filters
+++ b/projects/openttd_vs141.vcxproj.filters
@@ -1770,6 +1770,9 @@
     <ClCompile Include="..\src\zoning_cmd.cpp">
       <Filter>Command handlers</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\bitstream.cpp">
+      <Filter>CityMania files</Filter>
+    </ClCompile>
     <ClInclude Include="..\src\citymania\base64.h">
       <Filter>CityMania files</Filter>
     </ClInclude>
diff --git a/projects/openttd_vs142.vcxproj b/projects/openttd_vs142.vcxproj
index 5f951b24c4..1ab06df2df 100644
--- a/projects/openttd_vs142.vcxproj
+++ b/projects/openttd_vs142.vcxproj
@@ -893,6 +893,7 @@
     <ClCompile Include="..\src\water_cmd.cpp" />
     <ClCompile Include="..\src\waypoint_cmd.cpp" />
     <ClCompile Include="..\src\zoning_cmd.cpp" />
+    <ClCompile Include="..\src\bitstream.cpp" />
     <ClInclude Include="..\src\citymania\base64.h" />
     <ClCompile Include="..\src\citymania\base64.cpp" />
     <ClInclude Include="..\src\newgrf_revisions.hpp" />
diff --git a/projects/openttd_vs142.vcxproj.filters b/projects/openttd_vs142.vcxproj.filters
index 9959d7d71b..ac4873d994 100644
--- a/projects/openttd_vs142.vcxproj.filters
+++ b/projects/openttd_vs142.vcxproj.filters
@@ -1770,6 +1770,9 @@
     <ClCompile Include="..\src\zoning_cmd.cpp">
       <Filter>Command handlers</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\bitstream.cpp">
+      <Filter>CityMania files</Filter>
+    </ClCompile>
     <ClInclude Include="..\src\citymania\base64.h">
       <Filter>CityMania files</Filter>
     </ClInclude>