diff --git a/include/lib/bakery_lock.h b/include/lib/bakery_lock.h
index d4645c3..c80082e 100644
--- a/include/lib/bakery_lock.h
+++ b/include/lib/bakery_lock.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -12,6 +12,7 @@
 #define BAKERY_LOCK_MAX_CPUS		PLATFORM_CORE_COUNT
 
 #ifndef __ASSEMBLY__
+#include <cdefs.h>
 #include <stdint.h>
 
 /*****************************************************************************