diff --git a/hal/watchdog_api.h b/hal/watchdog_api.h
index 65d54ff957..d4b898f8c8 100644
--- a/hal/watchdog_api.h
+++ b/hal/watchdog_api.h
@@ -1,7 +1,7 @@
 /** \addtogroup hal */
 /** @{*/
 
-/* 
+/*
  * Copyright (c) 2018-2019 Arm Limited and affiliates.
  * SPDX-License-Identifier: Apache-2.0
  *