diff --git a/AirLibUnitTests/AirLibUnitTests.vcxproj b/AirLibUnitTests/AirLibUnitTests.vcxproj
index c39ab74f8b..be02714917 100644
--- a/AirLibUnitTests/AirLibUnitTests.vcxproj
+++ b/AirLibUnitTests/AirLibUnitTests.vcxproj
@@ -163,6 +163,7 @@
     <ClInclude Include="TestVehicles.hpp" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <Import Project="$(MSBuildThisFileDirectory)\..\AirLib\build\eigen.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
 </Project>
\ No newline at end of file