diff --git a/error_code.h b/error_code.h
index aab0917..65a5533 100644
--- a/error_code.h
+++ b/error_code.h
@@ -52,6 +52,7 @@
   kErrorCodeOmahaUpdateDeferredForBackoff = 40,
   kErrorCodePostinstallPowerwashError = 41,
   kErrorCodeUpdateCanceledByChannelChange = 42,
+  kErrorCodePostinstallFirmwareRONotUpdatable = 43,
 
   // Note: When adding new error codes, please remember to add the
   // error into one of the buckets in PayloadState::UpdateFailed method so