diff --git a/lib/psci/psci_system_off.c b/lib/psci/psci_system_off.c
index 4a55248..ef5d3d1 100644
--- a/lib/psci/psci_system_off.c
+++ b/lib/psci/psci_system_off.c
@@ -4,12 +4,12 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include <stddef.h>
 #include <arch_helpers.h>
 #include <assert.h>
 #include <console.h>
 #include <debug.h>
 #include <platform.h>
+#include <stddef.h>
 #include "psci_private.h"
 
 void __dead2 psci_system_off(void)