diff --git a/include/nuttx/analog/adc.h b/include/nuttx/analog/adc.h
index 3d5aa1fb067..04db97626cf 100644
--- a/include/nuttx/analog/adc.h
+++ b/include/nuttx/analog/adc.h
@@ -139,13 +139,13 @@ struct adc_ops_s
 
 struct adc_dev_s
 {
-  uint8_t                 ad_ocount;     /* The number of times the device has been opened */
-  uint8_t                 ad_nrxwaiters; /* Number of threads waiting to enqueue a message */
-  sem_t                   ad_closesem;   /* Locks out new opens while close is in progress */
-  sem_t                   ad_recvsem;    /* Used to wakeup user waiting for space in ad_recv.buffer */
-  struct adc_fifo_s       ad_recv;       /* Describes receive FIFO */
-  const struct adc_ops_s *ad_ops;        /* Arch-specific operations */
-  void                   *ad_priv;       /* Used by the arch-specific logic */
+  uint8_t                     ad_ocount;     /* The number of times the device has been opened */
+  uint8_t                     ad_nrxwaiters; /* Number of threads waiting to enqueue a message */
+  sem_t                       ad_closesem;   /* Locks out new opens while close is in progress */
+  sem_t                       ad_recvsem;    /* Used to wakeup user waiting for space in ad_recv.buffer */
+  struct adc_fifo_s           ad_recv;       /* Describes receive FIFO */
+  FAR const struct adc_ops_s *ad_ops;        /* Arch-specific operations */
+  FAR void                   *ad_priv;       /* Used by the arch-specific logic */
 };
 
 /************************************************************************************