diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
index b2ddd1ada8..de42e0189e 100644
--- a/drivers/usb/gadget/f_acm.c
+++ b/drivers/usb/gadget/f_acm.c
@@ -51,7 +51,7 @@ struct f_acm {
 #define ACM_CTRL_RTS	BIT(1)	/* unused with full duplex */
 #define ACM_CTRL_DTR	BIT(0)	/* host is ready for data r/w */
 
-	int controller_index;
+	struct udevice *udc;
 };
 
 static struct f_acm *default_acm_function;
@@ -489,7 +489,7 @@ static void __acm_tx(struct f_acm *f_acm)
 	int len, ret;
 
 	do {
-		usb_gadget_handle_interrupts(f_acm->controller_index);
+		dm_usb_gadget_handle_interrupts(f_acm->udc);
 
 		if (!(f_acm->handshake_bits & ACM_CTRL_DTR))
 			break;
@@ -520,7 +520,7 @@ static bool acm_connected(struct stdio_dev *dev)
 	struct f_acm *f_acm = stdio_to_acm(dev);
 
 	/* give a chance to process udc irq */
-	usb_gadget_handle_interrupts(f_acm->controller_index);
+	dm_usb_gadget_handle_interrupts(f_acm->udc);
 
 	return f_acm->connected;
 }
@@ -543,7 +543,10 @@ static int acm_add(struct usb_configuration *c)
 	f_acm->usb_function.descriptors = acm_fs_function;
 	f_acm->usb_function.hs_descriptors = acm_hs_function;
 	f_acm->usb_function.setup = acm_setup;
-	f_acm->controller_index = 0;
+
+	status = udc_device_get_by_index(0, &f_acm->udc);
+	if (status)
+		return status;
 
 	status = usb_add_function(c, &f_acm->usb_function);
 	if (status) {
@@ -567,7 +570,7 @@ static int acm_stdio_tstc(struct stdio_dev *dev)
 {
 	struct f_acm *f_acm = stdio_to_acm(dev);
 
-	usb_gadget_handle_interrupts(f_acm->controller_index);
+	dm_usb_gadget_handle_interrupts(f_acm->udc);
 
 	return (f_acm->rx_buf.size > 0);
 }