diff --git a/hardware.h b/hardware.h
index 5ab1fca..2693e3b 100644
--- a/hardware.h
+++ b/hardware.h
@@ -17,7 +17,11 @@
   Hardware() {}
 
   // HardwareInterface methods.
+  virtual const std::string BootKernelDevice();
   virtual const std::string BootDevice();
+  virtual bool IsKernelBootable(const std::string& kernel_device,
+                                bool* bootable);
+  virtual bool MarkKernelUnbootable(const std::string& kernel_device);
   virtual bool IsOfficialBuild();
   virtual bool IsNormalBootMode();
   virtual std::string GetHardwareClass();