diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index fe62c2170d01692fe3e05430aeba5374fc8c1742..bc849957508d305a283dbf28d65d5d54fd2b2e41 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -3880,6 +3880,7 @@ void proc_clear_tty(struct task_struct *p)
 	p->signal->tty = NULL;
 	spin_unlock_irq(&p->sighand->siglock);
 }
+EXPORT_SYMBOL(proc_clear_tty);
 
 static void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty)
 {