diff --git a/common/error_code.h b/common/error_code.h
index 7924579..8954f72 100644
--- a/common/error_code.h
+++ b/common/error_code.h
@@ -88,6 +88,8 @@
   kPackageExcludedFromUpdate = 62,
   kPostInstallMountError = 63,
   kOverlayfsenabledError = 64,
+  kUpdateProcessing = 65,
+  kUpdateAlreadyInstalled = 66,
 
   // VERY IMPORTANT! When adding new error codes:
   //
diff --git a/common/error_code_utils.cc b/common/error_code_utils.cc
index 12a98bf..421e124 100644
--- a/common/error_code_utils.cc
+++ b/common/error_code_utils.cc
@@ -177,6 +177,10 @@
       return "ErrorCode::kPostInstallMountError";
     case ErrorCode::kOverlayfsenabledError:
       return "ErrorCode::kOverlayfsenabledError";
+    case ErrorCode::kUpdateProcessing:
+      return "ErrorCode::kUpdateProcessing";
+    case ErrorCode::kUpdateAlreadyInstalled:
+      return "ErrorCode::kUpdateAlreadyInstalled";
       // Don't add a default case to let the compiler warn about newly added
       // error codes which should be added here.
   }