diff --git a/hardware_android.h b/hardware_android.h
index 5b3c99d..2a8f669 100644
--- a/hardware_android.h
+++ b/hardware_android.h
@@ -53,6 +53,7 @@
   bool GetNonVolatileDirectory(base::FilePath* path) const override;
   bool GetPowerwashSafeDirectory(base::FilePath* path) const override;
   int64_t GetBuildTimestamp() const override;
+  bool AllowDowngrade() const override;
   bool GetFirstActiveOmahaPingSent() const override;
   bool SetFirstActiveOmahaPingSent() override;