diff --git a/pid/zone.cpp b/pid/zone.cpp
index a8c388a..995b2aa 100644
--- a/pid/zone.cpp
+++ b/pid/zone.cpp
@@ -516,4 +516,9 @@
     _pidsFailSafePercent[name] = percent;
 }
 
+std::string DbusPidZone::leader() const
+{
+    return _maximumSetPointName;
+}
+
 } // namespace pid_control