diff --git a/csharp/Lib/Devices/AMPT/Ampt.csproj b/csharp/Lib/Devices/AMPT/Ampt.csproj
index 7e29f501e..eebc28a52 100644
--- a/csharp/Lib/Devices/AMPT/Ampt.csproj
+++ b/csharp/Lib/Devices/AMPT/Ampt.csproj
@@ -8,6 +8,7 @@
   <ItemGroup>
     <ProjectReference Include="../../Protocols/Modbus/Modbus.csproj" />
     <ProjectReference Include="../../Utils/Utils.csproj" />
+    <ProjectReference Include="../../Units/Units.csproj" />
   </ItemGroup>
 
 </Project>