diff --git a/boards/arm/stm32/stm32f4discovery/src/stm32_mmcsd.c b/boards/arm/stm32/stm32f4discovery/src/stm32_mmcsd.c
index f63e6e3352d..b97927cf0cd 100644
--- a/boards/arm/stm32/stm32f4discovery/src/stm32_mmcsd.c
+++ b/boards/arm/stm32/stm32f4discovery/src/stm32_mmcsd.c
@@ -1,4 +1,4 @@
-/*****************************************************************************
+/****************************************************************************
  * boards/arm/stm32/stm32f4discovery/src/stm32_mmcsd.c
  *
  *   Copyright 2019 Sony Home Entertainment & Sound Products Inc.
@@ -38,7 +38,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  ****************************************************************************/
 
-/*****************************************************************************
+/****************************************************************************
  * Included Files
  ****************************************************************************/
 
@@ -58,7 +58,7 @@
 #include <arch/board/board.h>
 #include "stm32f4discovery.h"
 
-/*****************************************************************************
+/****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
 
@@ -66,11 +66,11 @@
 #  error "SD driver requires CONFIG_DISABLE_MOUNTPOINT to be disabled"
 #endif
 
-/*****************************************************************************
+/****************************************************************************
  * Public Functions
  ****************************************************************************/
 
-/*****************************************************************************
+/****************************************************************************
  * Name: stm32_spi1register
  *
  * Description:
@@ -85,7 +85,7 @@ int stm32_spi2register(struct spi_dev_s *dev, spi_mediachange_t callback,
   return OK;
 }
 
-/*****************************************************************************
+/****************************************************************************
  * Name: stm32_mmcsd_initialize
  *
  * Description: