diff --git a/platform/Windows/build.vcxproj.filters b/platform/Windows/build.vcxproj.filters
index 230b56ba5..0d8bc3dc4 100644
--- a/platform/Windows/build.vcxproj.filters
+++ b/platform/Windows/build.vcxproj.filters
@@ -288,8 +288,8 @@
     <ClInclude Include="..\..\source\build\include\kplib.h">
       <Filter>Header Files</Filter>
     </ClInclude>
-    <ClInclude Include="..\..\source\build\include\libdivide.h">
-      <Filter>Header Files</Filter>
+    <ClInclude Include="..\..\source\thirdparty\include\libdivide.h">
+      <Filter>Third Party</Filter>
     </ClInclude>
     <ClInclude Include="..\..\source\thirdparty\include\lz4.h">
       <Filter>Header Files</Filter>
diff --git a/source/build/include/fix16.hpp b/source/thirdparty/include/fix16.hpp
similarity index 100%
rename from source/build/include/fix16.hpp
rename to source/thirdparty/include/fix16.hpp
diff --git a/source/build/include/libdivide.h b/source/thirdparty/include/libdivide.h
similarity index 100%
rename from source/build/include/libdivide.h
rename to source/thirdparty/include/libdivide.h