diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index d50a99f..00b47ea 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1275,7 +1275,7 @@
 	struct acm *acm = usb_get_intfdata(intf);
 	int cnt;
 
-	if (acm->dev->auto_pm) {
+	if (message.event & PM_EVENT_AUTO) {
 		int b;
 
 		spin_lock_irq(&acm->read_lock);