diff --git a/projects/openttd_vs100.vcxproj.filters b/projects/openttd_vs100.vcxproj.filters
--- a/projects/openttd_vs100.vcxproj.filters
+++ b/projects/openttd_vs100.vcxproj.filters
@@ -948,6 +948,12 @@
     <ClInclude Include="..\src\texteff.hpp">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\src\textfile_gui.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="..\src\textfile_type.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\src\tgp.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -1281,6 +1287,9 @@
     <ClCompile Include="..\src\terraform_gui.cpp">
       <Filter>GUI Source Code</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\textfile_gui.cpp">
+      <Filter>GUI Source Code</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\timetable_gui.cpp">
       <Filter>GUI Source Code</Filter>
     </ClCompile>