diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 01d882cf3775a2523662e4ab40f917a91eac5099..76ef95bcbbf272599f9516636b913921e07e3ae2 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -959,6 +959,7 @@ static void sierra_release(struct usb_serial *serial)
 			continue;
 		kfree(portdata);
 	}
+	kfree(serial->private);
 }
 
 #ifdef CONFIG_PM