diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 660b7caef784..b004b2a485c3 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -31,6 +31,7 @@
 #include <linux/tty_flip.h>
 #include <linux/module.h>
 #include <linux/bitops.h>
+#include <linux/uaccess.h>
 #include <linux/usb.h>
 #include <linux/usb/serial.h>
 #include <linux/serial.h>