diff --git a/drivers/input/serio/q40kbd.c b/drivers/input/serio/q40kbd.c
index eca125c8d53..ab28cf5949f 100644
--- a/drivers/input/serio/q40kbd.c
+++ b/drivers/input/serio/q40kbd.c
@@ -47,7 +47,7 @@ MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION("Q40 PS/2 keyboard controller driver");
 MODULE_LICENSE("GPL");
 
-DEFINE_SPINLOCK(q40kbd_lock);
+static DEFINE_SPINLOCK(q40kbd_lock);
 static struct serio *q40kbd_port;
 static struct platform_device *q40kbd_device;