diff --git a/drivers/mmcsd/sdio.c b/drivers/mmcsd/sdio.c
index 4550f97b92..bca78082f5 100644
--- a/drivers/mmcsd/sdio.c
+++ b/drivers/mmcsd/sdio.c
@@ -130,7 +130,7 @@ static int sdio_sendcmdpoll(FAR struct sdio_dev_s *dev,
 
 int sdio_io_rw_direct(FAR struct sdio_dev_s *dev, bool write,
                       uint8_t function, uint32_t address,
-                      uint8_t inb, uint8_t *outb)
+                      uint8_t inb, FAR uint8_t *outb)
 {
   union sdio_cmd5x arg;
   struct sdio_resp_r5 resp;
@@ -194,7 +194,7 @@ int sdio_io_rw_direct(FAR struct sdio_dev_s *dev, bool write,
 
 int sdio_io_rw_extended(FAR struct sdio_dev_s *dev, bool write,
                         uint8_t function, uint32_t address,
-                        bool inc_addr, uint8_t *buf,
+                        bool inc_addr, FAR uint8_t *buf,
                         unsigned int blocklen, unsigned int nblocks)
 {
   union sdio_cmd5x arg;
@@ -308,7 +308,7 @@ int sdio_io_rw_extended(FAR struct sdio_dev_s *dev, bool write,
   return OK;
 }
 
-int sdio_set_wide_bus(struct sdio_dev_s *dev)
+int sdio_set_wide_bus(FAR struct sdio_dev_s *dev)
 {
   int ret;
   uint8_t value;
diff --git a/include/nuttx/sdio.h b/include/nuttx/sdio.h
index af3f3692be..b2a928e4be 100644
--- a/include/nuttx/sdio.h
+++ b/include/nuttx/sdio.h
@@ -1035,7 +1035,7 @@ struct sdio_dev_s
 
 int sdio_probe(FAR struct sdio_dev_s *dev);
 
-int sdio_set_wide_bus(struct sdio_dev_s *dev);
+int sdio_set_wide_bus(FAR struct sdio_dev_s *dev);
 
 int sdio_set_blocksize(FAR struct sdio_dev_s *dev, uint8_t function,
                        uint16_t blocksize);
@@ -1046,11 +1046,11 @@ int sdio_enable_interrupt(FAR struct sdio_dev_s *dev, uint8_t function);
 
 int sdio_io_rw_direct(FAR struct sdio_dev_s *dev, bool write,
                       uint8_t function, uint32_t address,
-                      uint8_t inb, uint8_t *outb);
+                      uint8_t inb, FAR uint8_t *outb);
 
 int sdio_io_rw_extended(FAR struct sdio_dev_s *dev, bool write,
                         uint8_t function, uint32_t address,
-                        bool inc_addr, uint8_t *buf,
+                        bool inc_addr, FAR uint8_t *buf,
                         unsigned int blocklen, unsigned int nblocks);
 
 #undef EXTERN