diff --git a/pid/zone_interface.hpp b/pid/zone_interface.hpp
index 34a5352..33f0a6f 100644
--- a/pid/zone_interface.hpp
+++ b/pid/zone_interface.hpp
@@ -27,6 +27,9 @@
     /** Return a pointer to the sensor specified by name. */
     virtual Sensor* getSensor(const std::string& name) = 0;
 
+    /** Return the list of sensor names in the zone. */
+    virtual std::vector<std::string> getSensorNames(void) = 0;
+
     /* updateFanTelemetry() and updateSensors() both clear the failsafe state
      * for a sensor if it's no longer in that state.
      */