diff --git a/dbus/dbushelper.hpp b/dbus/dbushelper.hpp
index 5086826..7d2be2d 100644
--- a/dbus/dbushelper.hpp
+++ b/dbus/dbushelper.hpp
@@ -18,6 +18,8 @@
     static constexpr char propertiesintf[] = "org.freedesktop.DBus.Properties";
     static constexpr char criticalThreshInf[] =
         "xyz.openbmc_project.Sensor.Threshold.Critical";
+    static constexpr char warningThreshInf[] =
+        "xyz.openbmc_project.Sensor.Threshold.Warning";
     static constexpr char availabilityIntf[] =
         "xyz.openbmc_project.State.Decorator.Availability";