diff --git a/libweave/src/privet/cloud_delegate.h b/libweave/src/privet/cloud_delegate.h
index 24c98fb..74456d3 100644
--- a/libweave/src/privet/cloud_delegate.h
+++ b/libweave/src/privet/cloud_delegate.h
@@ -51,6 +51,9 @@
     virtual void OnStateChanged() {}
   };
 
+  // Returns the ID of the device.
+  virtual std::string GetDeviceId() const = 0;
+
   // Returns the model ID of the device.
   virtual std::string GetModelId() const = 0;