diff --git a/MUtilities_VS2013.vcxproj b/MUtilities_VS2013.vcxproj
index c8026c6..c648004 100644
--- a/MUtilities_VS2013.vcxproj
+++ b/MUtilities_VS2013.vcxproj
@@ -64,6 +64,7 @@
     <ClInclude Include="src\3rd_party\keccak\include\keccak_impl.h" />
     <ClInclude Include="src\3rd_party\strnatcmp\include\strnatcmp.h" />
     <ClInclude Include="src\DirLocker.h" />
+    <ClInclude Include="src\Internal.h" />
     <ClInclude Include="src\Mirrors.h" />
     <ClInclude Include="src\Utils_Win32.h" />
     <CustomBuild Include="include\Mutils\UpdateChecker.h">
diff --git a/MUtilities_VS2013.vcxproj.filters b/MUtilities_VS2013.vcxproj.filters
index 685cfb1..f710dc2 100644
--- a/MUtilities_VS2013.vcxproj.filters
+++ b/MUtilities_VS2013.vcxproj.filters
@@ -182,6 +182,9 @@
     <ClInclude Include="src\Mirrors.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\Internal.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <CustomBuild Include="include\Mutils\UpdateChecker.h">
diff --git a/MUtilities_VS2015.vcxproj b/MUtilities_VS2015.vcxproj
index c9f751e..945bbe2 100644
--- a/MUtilities_VS2015.vcxproj
+++ b/MUtilities_VS2015.vcxproj
@@ -64,6 +64,7 @@
     <ClInclude Include="src\3rd_party\keccak\include\keccak_impl.h" />
     <ClInclude Include="src\3rd_party\strnatcmp\include\strnatcmp.h" />
     <ClInclude Include="src\DirLocker.h" />
+    <ClInclude Include="src\Internal.h" />
     <ClInclude Include="src\Mirrors.h" />
     <ClInclude Include="src\Utils_Win32.h" />
     <CustomBuild Include="include\Mutils\UpdateChecker.h">
diff --git a/MUtilities_VS2015.vcxproj.filters b/MUtilities_VS2015.vcxproj.filters
index 685cfb1..f710dc2 100644
--- a/MUtilities_VS2015.vcxproj.filters
+++ b/MUtilities_VS2015.vcxproj.filters
@@ -182,6 +182,9 @@
     <ClInclude Include="src\Mirrors.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\Internal.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <CustomBuild Include="include\Mutils\UpdateChecker.h">