diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index 24aa6e88e223d5772649182d878342224749c3c1..a59eac584d1621b3e4824ca3e644d944a31266a6 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -925,6 +925,7 @@ static void isicom_shutdown_port(struct isi_port *port)
 		if (!card->count)
 			isicom_shutdown_board(card);
 	}
+	tty_kref_put(tty);
 }
 
 static void isicom_flush_buffer(struct tty_struct *tty)