diff --git a/Adafruit_Sensor.h b/Adafruit_Sensor.h
index 7742afc..f93c3cd 100644
--- a/Adafruit_Sensor.h
+++ b/Adafruit_Sensor.h
@@ -143,7 +143,7 @@ class Adafruit_Sensor {
   virtual ~Adafruit_Sensor() {}
 
   // These must be defined by the subclass
-  virtual void enableAutoRange(bool enabled) {};
+  virtual void enableAutoRange(bool enabled) { (void)enabled; /* suppress unused warning */ };
   virtual bool getEvent(sensors_event_t*) = 0;
   virtual void getSensor(sensor_t*) = 0;