diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 2fda1c0182b74848259f563a3ccfa38731c209f9..f8424d1bfc1b279a5e4a51fc4453fb3e3f847ffb 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -26,7 +26,6 @@
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/slab.h>
-#include <linux/smp_lock.h>
 #include <linux/tty.h>
 #include <linux/tty_driver.h>
 #include <linux/tty_flip.h>