diff --git a/cycle_breaker.cc b/cycle_breaker.cc
index 8400366..f1a2728 100644
--- a/cycle_breaker.cc
+++ b/cycle_breaker.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -7,6 +7,7 @@
 #include <set>
 #include <utility>
 #include "base/string_util.h"
+#include <base/stringprintf.h>
 #include "update_engine/graph_utils.h"
 #include "update_engine/tarjan.h"
 #include "update_engine/utils.h"