diff --git a/projects/VC100/SimGear.vcxproj b/projects/VC100/SimGear.vcxproj
index 2abcb4d5..3c209806 100644
--- a/projects/VC100/SimGear.vcxproj
+++ b/projects/VC100/SimGear.vcxproj
@@ -220,6 +220,7 @@
     <ClCompile Include="..\..\simgear\misc\sg_dir.cxx" />
     <ClCompile Include="..\..\simgear\misc\sg_path.cxx" />
     <ClCompile Include="..\..\simgear\misc\sgstream.cxx" />
+    <ClCompile Include="..\..\simgear\misc\sg_sleep.cxx" />
     <ClCompile Include="..\..\simgear\misc\strutils.cxx" />
     <ClCompile Include="..\..\simgear\misc\tabbed_values.cxx" />
     <ClCompile Include="..\..\simgear\misc\texcoord.cxx" />
@@ -422,6 +423,7 @@
     <ClInclude Include="..\..\simgear\misc\sg_dir.hxx" />
     <ClInclude Include="..\..\simgear\misc\sg_path.hxx" />
     <ClInclude Include="..\..\simgear\misc\sgstream.hxx" />
+    <ClInclude Include="..\..\simgear\misc\sg_sleep.hxx" />
     <ClInclude Include="..\..\simgear\misc\stopwatch.hxx" />
     <ClInclude Include="..\..\simgear\misc\strutils.hxx" />
     <ClInclude Include="..\..\simgear\misc\tabbed_values.hxx" />
diff --git a/projects/VC100/SimGear.vcxproj.filters b/projects/VC100/SimGear.vcxproj.filters
index cd99edfb..e11890ee 100644
--- a/projects/VC100/SimGear.vcxproj.filters
+++ b/projects/VC100/SimGear.vcxproj.filters
@@ -603,6 +603,9 @@
     <ClCompile Include="..\..\simgear\props\propertyObject.cxx">
       <Filter>Lib_sgprops</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\simgear\misc\sg_sleep.cxx">
+      <Filter>Lib_sgmisc</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\simgear\bucket\newbucket.hxx">
@@ -1207,6 +1210,9 @@
     <ClInclude Include="..\..\simgear\props\propertyObject.hxx">
       <Filter>Lib_sgprops</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\simgear\misc\sg_sleep.hxx">
+      <Filter>Lib_sgmisc</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="..\..\simgear\math\linintp2.inl">