From 5f81aeeb95948d87c4259612c328949a35d61a0f Mon Sep 17 00:00:00 2001
From: Mitsumine Suzu <60875431+verylowfreq@users.noreply.github.com>
Date: Wed, 27 May 2026 04:19:58 +0900
Subject: [PATCH] Set String Descriptor for CDC if not use.

---
 src/arduino/Adafruit_USBD_CDC.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/arduino/Adafruit_USBD_CDC.cpp b/src/arduino/Adafruit_USBD_CDC.cpp
index 11c5673e..126ec0f1 100644
--- a/src/arduino/Adafruit_USBD_CDC.cpp
+++ b/src/arduino/Adafruit_USBD_CDC.cpp
@@ -102,7 +102,9 @@ void Adafruit_USBD_CDC::begin(uint32_t baud) {
   }
 
   _instance = _instance_count++;
-  this->setStringDescriptor("TinyUSB Serial");
+  if (_strid == 0) {
+    this->setStringDescriptor("TinyUSB Serial");
+  }
   TinyUSBDevice.addInterface(*this);
 }