diff --git a/examples/aobench_instrumented/aobench_instrumented.vcxproj b/examples/aobench_instrumented/aobench_instrumented.vcxproj
index 6917c302..5e3021fa 100644
--- a/examples/aobench_instrumented/aobench_instrumented.vcxproj
+++ b/examples/aobench_instrumented/aobench_instrumented.vcxproj
@@ -21,6 +21,7 @@
   <ItemGroup>
     <ClCompile Include="ao.cpp" />
     <ClCompile Include="instrument.cpp" />
+    <ClCompile Include="../tasksys.cpp" />
   </ItemGroup>
   <ItemGroup>
     <CustomBuild Include="ao.ispc">