diff --git a/os/vfs/drivers/fatfs/drvfatfs.c b/os/vfs/drivers/fatfs/drvfatfs.c
index 959181681..4a0084307 100644
--- a/os/vfs/drivers/fatfs/drvfatfs.c
+++ b/os/vfs/drivers/fatfs/drvfatfs.c
@@ -19,7 +19,7 @@
 
 /**
  * @file    vfs/drivers/drvfatfs.c
- * @brief   HAL FatFS VFS driver code.
+ * @brief   FatFS VFS driver code.
  *
  * @addtogroup VFS_DRV_FATFS
  * @{
diff --git a/os/vfs/drivers/fatfs/drvfatfs.h b/os/vfs/drivers/fatfs/drvfatfs.h
index 06db18c6d..33ea9a8e9 100644
--- a/os/vfs/drivers/fatfs/drvfatfs.h
+++ b/os/vfs/drivers/fatfs/drvfatfs.h
@@ -18,10 +18,10 @@
 */
 /**
  * @file    vfs/drivers/drvfatfs.h
- * @brief   HAL FatFS VFS driver header.
+ * @brief   FatFS VFS driver header.
  *
  * @addtogroup VFS_DRV_FATFS
- * @details Exposes HAL FatFS as VFS files.
+ * @details Exposes FatFS as VFS files.
  * @{
  */
 
@@ -166,8 +166,6 @@ typedef struct vfs_fatfs_driver {
 /* External declarations.                                                    */
 /*===========================================================================*/
 
-extern vfs_fatfs_driver_c vfs_fatfs;
-
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/os/vfs/drivers/overlay/drvoverlay.c b/os/vfs/drivers/overlay/drvoverlay.c
index 4f96de2b0..4a5a1377b 100644
--- a/os/vfs/drivers/overlay/drvoverlay.c
+++ b/os/vfs/drivers/overlay/drvoverlay.c
@@ -19,7 +19,7 @@
 
 /**
  * @file    vfs/drivers/drvoverlay.c
- * @brief   HAL Overlay VFS driver code.
+ * @brief   Overlays VFS driver code.
  *
  * @addtogroup VFS_DRV_OVERLAY
  * @{
diff --git a/os/vfs/drivers/overlay/drvoverlay.h b/os/vfs/drivers/overlay/drvoverlay.h
index 21f083acc..6ae95fbdc 100644
--- a/os/vfs/drivers/overlay/drvoverlay.h
+++ b/os/vfs/drivers/overlay/drvoverlay.h
@@ -18,10 +18,10 @@
 */
 /**
  * @file    vfs/drivers/drvoverlay.h
- * @brief   HAL Overlay VFS driver header.
+ * @brief   Overlays VFS driver header.
  *
  * @addtogroup VFS_DRV_OVERLAY
- * @details Exposes HAL Overlay as VFS files.
+ * @details Implements overlays on top of another VFS driver.
  * @{
  */