diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 4bd40bb..1fb3e51 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -454,7 +454,10 @@
 	tty->driver_data = line;
 	line->tty = tty;
 
-	enable_chan(line);
+	err = enable_chan(line);
+	if (err)
+		return err;
+
 	INIT_DELAYED_WORK(&line->task, line_timer_cb);
 
 	if(!line->sigio){