diff --git a/drivers/staging/iio/Documentation/iio_event_monitor.c b/drivers/staging/iio/Documentation/iio_event_monitor.c
index 72c96aa6e992..019a6e5cdcd8 100644
--- a/drivers/staging/iio/Documentation/iio_event_monitor.c
+++ b/drivers/staging/iio/Documentation/iio_event_monitor.c
@@ -28,6 +28,7 @@
 #include <sys/ioctl.h>
 #include "iio_utils.h"
 #include <linux/iio/events.h>
+#include <linux/iio/types.h>
 
 static const char * const iio_chan_type_name_spec[] = {
 	[IIO_VOLTAGE] = "voltage",