diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
index f18c6a0..2665fa4 100644
--- a/drivers/usb/gadget/f_acm.c
+++ b/drivers/usb/gadget/f_acm.c
@@ -238,18 +238,21 @@
 		return -ENODEV;
 
 	f_acm->ep_in = ep;
+	ep->driver_data = c->cdev; /* claim */
 
 	ep = usb_ep_autoconfig(gadget, &acm_fs_out_desc);
 	if (!ep)
 		return -ENODEV;
 
 	f_acm->ep_out = ep;
+	ep->driver_data = c->cdev; /* claim */
 
 	ep = usb_ep_autoconfig(gadget, &acm_fs_notify_desc);
 	if (!ep)
 		return -ENODEV;
 
 	f_acm->ep_notify = ep;
+	ep->driver_data = c->cdev; /* claim */
 
 	if (gadget_is_dualspeed(gadget)) {
 		/* Assume endpoint addresses are the same for both speeds */