diff --git a/postinstall_runner_action.cc b/postinstall_runner_action.cc
index 2c8b943..20989aa 100644
--- a/postinstall_runner_action.cc
+++ b/postinstall_runner_action.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -57,7 +57,9 @@
   vector<string> command;
   command.push_back(temp_rootfs_dir_ + kPostinstallScript);
   command.push_back(install_device);
-  Subprocess::Get().Exec(command, StaticCompletePostinstall, this);
+  if (!Subprocess::Get().Exec(command, StaticCompletePostinstall, this)) {
+    CompletePostinstall(1);
+  }
 }
 
 void PostinstallRunnerAction::CompletePostinstall(int return_code) {