diff --git a/build/fplib.vcxproj b/build/fplib.vcxproj
index 5f3b7e5f3..1aa164e01 100644
--- a/build/fplib.vcxproj
+++ b/build/fplib.vcxproj
@@ -178,6 +178,8 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
       </ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\src\fp\fplib04.cpp" />
+    <ClCompile Include="..\src\ve\velib01.cpp" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
diff --git a/build/fplib.vcxproj.filters b/build/fplib.vcxproj.filters
index 027ae41f8..daed83596 100644
--- a/build/fplib.vcxproj.filters
+++ b/build/fplib.vcxproj.filters
@@ -21,6 +21,12 @@
     <ClCompile Include="..\src\fe\felib.cpp">
       <Filter>Sources</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\ve\velib01.cpp">
+      <Filter>Sources</Filter>
+    </ClCompile>
+    <ClCompile Include="..\src\fp\fplib04.cpp">
+      <Filter>Sources</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\src\fp\fplib.h">