diff --git a/build/vc100/turtle.vcxproj b/build/vc100/turtle.vcxproj
index c358010..bb4c605 100644
--- a/build/vc100/turtle.vcxproj
+++ b/build/vc100/turtle.vcxproj
@@ -37,6 +37,7 @@
     <ClInclude Include="..\..\turtle\detail\group.hpp" />
     <ClInclude Include="..\..\turtle\detail\invocation.hpp" />
     <ClInclude Include="..\..\turtle\detail\lambda.hpp" />
+    <ClInclude Include="..\..\turtle\detail\object_impl.hpp" />
     <ClInclude Include="..\..\turtle\detail\operators.hpp" />
     <ClInclude Include="..\..\turtle\detail\parameters.hpp" />
     <ClInclude Include="..\..\turtle\detail\parent.hpp" />
@@ -50,7 +51,6 @@
     <ClInclude Include="..\..\turtle\log.hpp" />
     <ClInclude Include="..\..\turtle\mock.hpp" />
     <ClInclude Include="..\..\turtle\object.hpp" />
-    <ClInclude Include="..\..\turtle\object_impl.hpp" />
     <ClInclude Include="..\..\turtle\sequence.hpp" />
   </ItemGroup>
   <PropertyGroup Label="Globals">
diff --git a/build/vc100/turtle.vcxproj.filters b/build/vc100/turtle.vcxproj.filters
index 13e2769..a628ba1 100644
--- a/build/vc100/turtle.vcxproj.filters
+++ b/build/vc100/turtle.vcxproj.filters
@@ -106,8 +106,8 @@
     <ClInclude Include="..\..\turtle\detail\operators.hpp">
       <Filter>Source Files\detail</Filter>
     </ClInclude>
-    <ClInclude Include="..\..\turtle\object_impl.hpp">
-      <Filter>Source Files</Filter>
+    <ClInclude Include="..\..\turtle\detail\object_impl.hpp">
+      <Filter>Source Files\detail</Filter>
     </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/turtle/object_impl.hpp b/turtle/detail/object_impl.hpp
similarity index 100%
rename from turtle/object_impl.hpp
rename to turtle/detail/object_impl.hpp
diff --git a/turtle/object.hpp b/turtle/object.hpp
index 11180b9..769137a 100644
--- a/turtle/object.hpp
+++ b/turtle/object.hpp
@@ -9,9 +9,9 @@
 #ifndef MOCK_OBJECT_HPP_INCLUDED
 #define MOCK_OBJECT_HPP_INCLUDED
 
-#include "object_impl.hpp"
 #include "detail/root.hpp"
 #include "detail/type_name.hpp"
+#include "detail/object_impl.hpp"
 #include <boost/test/utils/basic_cstring/basic_cstring.hpp>
 #include <boost/type_traits/is_base_of.hpp>
 #include <boost/utility/enable_if.hpp>