diff --git a/drivers/bch/bchdev_driver.c b/drivers/bch/bchdev_driver.c
index 8e36bcb82e..cf5ab40252 100644
--- a/drivers/bch/bchdev_driver.c
+++ b/drivers/bch/bchdev_driver.c
@@ -106,7 +106,6 @@ static int bch_open(FAR struct file *filp)
 {
   FAR struct inode *inode = filp->f_inode;
   FAR struct bchlib_s *bch;
-  int ret;
 
   DEBUGASSERT(inode && inode->i_private);
   bch = (FAR struct bchlib_s *)inode->i_private;
@@ -124,7 +123,7 @@ static int bch_open(FAR struct file *filp)
     }
   bchlib_semgive(bch);
 
-  return ret;
+  return OK;
 }
 
 /****************************************************************************
diff --git a/drivers/mmcsd/mmcsd_spi.c b/drivers/mmcsd/mmcsd_spi.c
index 06b660a2f6..dafcc4fc21 100644
--- a/drivers/mmcsd/mmcsd_spi.c
+++ b/drivers/mmcsd/mmcsd_spi.c
@@ -375,7 +375,7 @@ static inline void mmcsd_synchronize(FAR struct mmcsd_slot_s *slot)
   SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
 }
 #else
-#  define  mmcsd_synchronize(slot) /* No synchronization needed */s
+#  define  mmcsd_synchronize(slot) /* No synchronization needed */
 #endif
 
 /****************************************************************************
diff --git a/examples/nsh/nsh_lm3s.c b/examples/nsh/nsh_lm3s.c
index 75576bbbe6..791bf9d71a 100644
--- a/examples/nsh/nsh_lm3s.c
+++ b/examples/nsh/nsh_lm3s.c
@@ -38,8 +38,9 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
-
 #include <sys/types.h>
+
+#include <stdio.h>
 #include <debug.h>
 #include <errno.h>
 
diff --git a/examples/nsh/nsh_lpc214x.c b/examples/nsh/nsh_lpc214x.c
index 487d3e03f6..937db8a61e 100644
--- a/examples/nsh/nsh_lpc214x.c
+++ b/examples/nsh/nsh_lpc214x.c
@@ -38,8 +38,9 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
-
 #include <sys/types.h>
+
+#include <stdio.h>
 #include <debug.h>
 #include <errno.h>
 
diff --git a/examples/nsh/nsh_serial.c b/examples/nsh/nsh_serial.c
index 90107bb67e..fe5fac93bc 100644
--- a/examples/nsh/nsh_serial.c
+++ b/examples/nsh/nsh_serial.c
@@ -363,4 +363,5 @@ int nsh_consolemain(int argc, char *argv[])
           fflush(pstate->ss_stream);
         }
     }
+  return OK;
 }