diff --git a/action_processor.h b/action_processor.h
index 98fc853..b2c1392 100644
--- a/action_processor.h
+++ b/action_processor.h
@@ -35,6 +35,7 @@
   kActionCodeDownloadTransferError = 9,
   kActionCodeDownloadHashMismatchError = 10,
   kActionCodeDownloadSizeMismatchError = 11,
+  kActionCodeDownloadPayloadVerificationError = 12,
 };
 
 class AbstractAction;