1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
index d47a123f15ab..bd6226cbae86 100644
--- a/drivers/usb/gadget/f_acm.c
+++ b/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 */
 };