diff --git a/error_code.h b/error_code.h
index db023f7..aab0917 100644
--- a/error_code.h
+++ b/error_code.h
@@ -15,7 +15,7 @@
   kErrorCodeOmahaResponseHandlerError = 3,
   kErrorCodeFilesystemCopierError = 4,
   kErrorCodePostinstallRunnerError = 5,
-  kErrorCodeSetBootableFlagError = 6,  // TODO(petkov): Unused. Recycle?
+  kErrorCodePayloadMismatchedType = 6,
   kErrorCodeInstallDeviceOpenError = 7,
   kErrorCodeKernelDeviceOpenError = 8,
   kErrorCodeDownloadTransferError = 9,