diff --git a/[refs] b/[refs]
index db4f087f29b3..39c078c2848b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 92d3489ec58b5897a407b07ad9954497a119d3d0
+refs/heads/master: 5c8db070b4480c43394680d9dfd2ddb06b97d2ae
diff --git a/trunk/drivers/usb/gadget/f_acm.c b/trunk/drivers/usb/gadget/f_acm.c
index d47a123f15ab..bd6226cbae86 100644
--- a/trunk/drivers/usb/gadget/f_acm.c
+++ b/trunk/drivers/usb/gadget/f_acm.c
@@ -111,7 +111,7 @@ acm_iad_descriptor = {
 	.bInterfaceCount = 	2,	// control + data
 	.bFunctionClass =	USB_CLASS_COMM,
 	.bFunctionSubClass =	USB_CDC_SUBCLASS_ACM,
-	.bFunctionProtocol =	USB_CDC_PROTO_NONE,
+	.bFunctionProtocol =	USB_CDC_ACM_PROTO_AT_V25TER,
 	/* .iFunction =		DYNAMIC */
 };