diff --git a/include/TachSensor.hpp b/include/TachSensor.hpp
index 4588653..f79fb4d 100644
--- a/include/TachSensor.hpp
+++ b/include/TachSensor.hpp
@@ -73,6 +73,7 @@
     std::optional<RedundancySensor>* redundancy;
     std::unique_ptr<PresenceSensor> presence;
     std::shared_ptr<sdbusplus::asio::dbus_interface> itemIface;
+    std::shared_ptr<sdbusplus::asio::dbus_interface> itemAssoc;
     boost::asio::posix::stream_descriptor inputDev;
     boost::asio::deadline_timer waitTimer;
     boost::asio::streambuf readBuf;