diff --git a/hardware_chromeos.h b/hardware_chromeos.h
index 2d43931..9cb02f8 100644
--- a/hardware_chromeos.h
+++ b/hardware_chromeos.h
@@ -48,6 +48,7 @@
   std::string GetFirmwareVersion() const override;
   std::string GetECVersion() const override;
   int GetMinKernelKeyVersion() const override;
+  int GetMinFirmwareKeyVersion() const override;
   bool SetMaxKernelKeyRollforward(int max_kernel_rollforward) override;
   int GetPowerwashCount() const override;
   bool SchedulePowerwash() override;