diff --git a/real_system_state.h b/real_system_state.h
index 42d1509..83f3ac1 100644
--- a/real_system_state.h
+++ b/real_system_state.h
@@ -25,6 +25,7 @@
   virtual ~RealSystemState() {}
 
   virtual bool IsOOBEComplete();
+  virtual bool IsOfficialBuild();
 
   virtual inline void set_device_policy(
       const policy::DevicePolicy* device_policy) {