diff --git a/drivers/staging/iio/Documentation/generic_buffer.c b/drivers/staging/iio/Documentation/generic_buffer.c
index b16c4b208ae4..827e92de8e30 100644
--- a/drivers/staging/iio/Documentation/generic_buffer.c
+++ b/drivers/staging/iio/Documentation/generic_buffer.c
@@ -18,6 +18,8 @@
  *
  */
 
+#define _GNU_SOURCE
+
 #include <unistd.h>
 #include <dirent.h>
 #include <fcntl.h>
@@ -29,6 +31,7 @@
 #include <string.h>
 #include <poll.h>
 #include <endian.h>
+#include <getopt.h>
 #include <inttypes.h>
 #include "iio_utils.h"
 
diff --git a/drivers/staging/iio/Documentation/iio_utils.h b/drivers/staging/iio/Documentation/iio_utils.h
index 9c7a5aa5e2c7..c0448b3e20de 100644
--- a/drivers/staging/iio/Documentation/iio_utils.h
+++ b/drivers/staging/iio/Documentation/iio_utils.h
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include <stdint.h>
 #include <dirent.h>
+#include <errno.h>
 
 /* Made up value to limit allocation sizes */
 #define IIO_MAX_NAME_LENGTH 30