diff --git a/plat/rpi3/rpi3_stack_protector.c b/plat/rpi3/rpi3_stack_protector.c
index 815f731..6f49f61 100644
--- a/plat/rpi3/rpi3_stack_protector.c
+++ b/plat/rpi3/rpi3_stack_protector.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,6 +7,7 @@
 #include <stdint.h>
 
 #include <lib/utils.h>
+#include <lib/utils_def.h>
 
 #include "rpi3_private.h"