diff --git a/libpEpAdapter/libpEpAdapter.vcxproj b/libpEpAdapter/libpEpAdapter.vcxproj
index e5cec6a..1240878 100644
--- a/libpEpAdapter/libpEpAdapter.vcxproj
+++ b/libpEpAdapter/libpEpAdapter.vcxproj
@@ -99,6 +99,7 @@ XCOPY "$(SolutionDir)libpEpAdapter\*.hxx" "$(SolutionDir)pEp\" /I/F/Y
     <ClCompile Include="..\Adapter.cc" />
     <ClCompile Include="..\callback_dispatcher.cc" />
     <ClCompile Include="..\call_with_lock.cc" />
+    <ClCompile Include="..\constant_time_algo.cc" />
     <ClCompile Include="..\message_cache.cc" />
     <ClCompile Include="..\passphrase_cache.cc" />
     <ClCompile Include="..\slurp.cc" />
@@ -108,6 +109,7 @@ XCOPY "$(SolutionDir)libpEpAdapter\*.hxx" "$(SolutionDir)pEp\" /I/F/Y
     <ClInclude Include="..\Adapter.hh" />
     <ClInclude Include="..\Adapter.hxx" />
     <ClInclude Include="..\callback_dispatcher.hh" />
+    <ClInclude Include="..\constant_time_algo.hh" />
     <ClInclude Include="..\locked_queue.hh" />
     <ClInclude Include="..\message_cache.hh" />
     <ClInclude Include="..\passphrase_cache.hh" />
diff --git a/libpEpAdapter/libpEpAdapter.vcxproj.filters b/libpEpAdapter/libpEpAdapter.vcxproj.filters
index da8e8f7..386d89f 100644
--- a/libpEpAdapter/libpEpAdapter.vcxproj.filters
+++ b/libpEpAdapter/libpEpAdapter.vcxproj.filters
@@ -39,6 +39,9 @@
     <ClCompile Include="..\message_cache.cc">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="..\constant_time_algo.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\Adapter.hh">
@@ -74,5 +77,8 @@
     <ClInclude Include="..\message_cache.hh">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\constant_time_algo.hh">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file