diff --git a/projects/VC100/FlightGear/FlightGear.vcxproj b/projects/VC100/FlightGear/FlightGear.vcxproj
index 5e937cbba..e49368081 100644
--- a/projects/VC100/FlightGear/FlightGear.vcxproj
+++ b/projects/VC100/FlightGear/FlightGear.vcxproj
@@ -416,6 +416,7 @@
     <ClCompile Include="..\..\..\src\Fdm\JSBSim\math\FGFunction.cpp" />
     <ClCompile Include="..\..\..\src\Fdm\JSBSim\math\FGLocation.cpp" />
     <ClCompile Include="..\..\..\src\Fdm\JSBSim\math\FGMatrix33.cpp" />
+    <ClCompile Include="..\..\..\src\FDM\JSBSim\math\FGModelFunctions.cpp" />
     <ClCompile Include="..\..\..\src\Fdm\JSBSim\math\FGPropertyValue.cpp" />
     <ClCompile Include="..\..\..\src\Fdm\JSBSim\math\FGQuaternion.cpp" />
     <ClCompile Include="..\..\..\src\Fdm\JSBSim\math\FGRealValue.cpp" />
@@ -994,6 +995,7 @@
     <ClInclude Include="..\..\..\src\Fdm\JSBSim\math\FGFunction.h" />
     <ClInclude Include="..\..\..\src\Fdm\JSBSim\math\FGLocation.h" />
     <ClInclude Include="..\..\..\src\Fdm\JSBSim\math\FGMatrix33.h" />
+    <ClInclude Include="..\..\..\src\FDM\JSBSim\math\FGModelFunctions.h" />
     <ClInclude Include="..\..\..\src\Fdm\JSBSim\math\FGParameter.h" />
     <ClInclude Include="..\..\..\src\Fdm\JSBSim\math\FGPropertyValue.h" />
     <ClInclude Include="..\..\..\src\Fdm\JSBSim\math\FGQuaternion.h" />
@@ -1431,4 +1433,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/projects/VC100/FlightGear/FlightGear.vcxproj.filters b/projects/VC100/FlightGear/FlightGear.vcxproj.filters
index 7fb60976d..8c7e59f3d 100644
--- a/projects/VC100/FlightGear/FlightGear.vcxproj.filters
+++ b/projects/VC100/FlightGear/FlightGear.vcxproj.filters
@@ -1548,6 +1548,9 @@
     <ClCompile Include="..\..\..\src\Time\TimeManager.cxx">
       <Filter>Lib_Time</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\src\FDM\JSBSim\math\FGModelFunctions.cpp">
+      <Filter>Lib_JSBSim\math</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\src\Aircraft\controls.hxx">
@@ -2921,6 +2924,9 @@
     <ClInclude Include="..\..\..\src\Time\TimeManager.hxx">
       <Filter>Lib_Time</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\src\FDM\JSBSim\math\FGModelFunctions.h">
+      <Filter>Lib_JSBSim\math</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="..\flightgear.rc" />
@@ -2933,4 +2939,4 @@
   <ItemGroup>
     <CustomBuild Include="..\..\..\src\Include\config.h-msvc90" />
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file