diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c
index 386a44da72480035e8c85d2702d3973df7182600..763075ba3423237459111260c936792ab57c8ee1 100644
--- a/drivers/staging/iio/adc/mxs-lradc.c
+++ b/drivers/staging/iio/adc/mxs-lradc.c
@@ -26,6 +26,7 @@
 #include <linux/list.h>
 #include <linux/io.h>
 #include <linux/module.h>
+#include <linux/mutex.h>
 #include <linux/platform_device.h>
 #include <linux/spinlock.h>
 #include <linux/wait.h>