diff --git a/examples/device/cdc_msc_hid/src/main.c b/examples/device/cdc_msc_hid/src/main.c
index c3295fd5..65ef1dcb 100644
--- a/examples/device/cdc_msc_hid/src/main.c
+++ b/examples/device/cdc_msc_hid/src/main.c
@@ -30,6 +30,8 @@
 #include "bsp/board.h"
 #include "tusb.h"
 
+#include "usb_descriptors.h"
+
 //--------------------------------------------------------------------+
 // MACRO CONSTANT TYPEDEF PROTYPES
 //--------------------------------------------------------------------+
@@ -162,13 +164,6 @@ void tud_cdc_rx_cb(uint8_t itf)
 //--------------------------------------------------------------------+
 #if CFG_TUD_HID
 
-// Must match with ID declared by HID Report Descriptor, better to be in header file
-enum
-{
-  REPORT_ID_KEYBOARD = 1,
-  REPORT_ID_MOUSE
-};
-
 void hid_task(void)
 {
   // Poll every 10ms
diff --git a/examples/device/cdc_msc_hid/src/usb_descriptors.c b/examples/device/cdc_msc_hid/src/usb_descriptors.c
index 17a98c9d..ee79f4ec 100644
--- a/examples/device/cdc_msc_hid/src/usb_descriptors.c
+++ b/examples/device/cdc_msc_hid/src/usb_descriptors.c
@@ -24,6 +24,7 @@
  */
 
 #include "tusb.h"
+#include "usb_descriptors.h"
 
 /* A combination of interfaces must have a unique product id, since PC will save device driver after the first plug.
  * Same VID/PID with different interface e.g MSC (first), then CDC (later) will possibly cause system error on PC.
@@ -79,13 +80,7 @@ uint8_t const * tud_descriptor_device_cb(void)
 //--------------------------------------------------------------------+
 // HID Report Descriptor
 //--------------------------------------------------------------------+
-
 #if CFG_TUD_HID
-enum
-{
-  REPORT_ID_KEYBOARD = 1,
-  REPORT_ID_MOUSE
-};
 
 uint8_t const desc_hid_report[] =
 {
diff --git a/examples/device/cdc_msc_hid/src/usb_descriptors.h b/examples/device/cdc_msc_hid/src/usb_descriptors.h
new file mode 100644
index 00000000..6992d334
--- /dev/null
+++ b/examples/device/cdc_msc_hid/src/usb_descriptors.h
@@ -0,0 +1,34 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef USB_DESCRIPTORS_H_
+#define USB_DESCRIPTORS_H_
+
+enum
+{
+  REPORT_ID_KEYBOARD = 1,
+  REPORT_ID_MOUSE
+};
+
+#endif /* USB_DESCRIPTORS_H_ */
diff --git a/examples/device/cdc_msc_hid_freertos/src/main.c b/examples/device/cdc_msc_hid_freertos/src/main.c
index 56ea3a7a..cb707675 100644
--- a/examples/device/cdc_msc_hid_freertos/src/main.c
+++ b/examples/device/cdc_msc_hid_freertos/src/main.c
@@ -36,6 +36,8 @@
 #include "bsp/board.h"
 #include "tusb.h"
 
+#include "usb_descriptors.h"
+
 //--------------------------------------------------------------------+
 // MACRO CONSTANT TYPEDEF PROTYPES
 //--------------------------------------------------------------------+
@@ -194,13 +196,6 @@ void tud_cdc_rx_cb(uint8_t itf)
 //--------------------------------------------------------------------+
 #if CFG_TUD_HID
 
-// Must match with ID declared by HID Report Descriptor, better to be in header file
-enum
-{
-  REPORT_ID_KEYBOARD = 1,
-  REPORT_ID_MOUSE
-};
-
 void hid_task(void* params)
 {
   (void) params;
diff --git a/examples/device/cdc_msc_hid_freertos/src/usb_descriptors.c b/examples/device/cdc_msc_hid_freertos/src/usb_descriptors.c
index 03f80f8c..699067f7 100644
--- a/examples/device/cdc_msc_hid_freertos/src/usb_descriptors.c
+++ b/examples/device/cdc_msc_hid_freertos/src/usb_descriptors.c
@@ -24,6 +24,7 @@
  */
 
 #include "tusb.h"
+#include "usb_descriptors.h"
 
 /* A combination of interfaces must have a unique product id, since PC will save device driver after the first plug.
  * Same VID/PID with different interface e.g MSC (first), then CDC (later) will possibly cause system error on PC.
@@ -79,13 +80,7 @@ uint8_t const * tud_descriptor_device_cb(void)
 //--------------------------------------------------------------------+
 // HID Report Descriptor
 //--------------------------------------------------------------------+
-
 #if CFG_TUD_HID
-enum
-{
-  REPORT_ID_KEYBOARD = 1,
-  REPORT_ID_MOUSE
-};
 
 uint8_t const desc_hid_report[] =
 {
diff --git a/examples/device/cdc_msc_hid_freertos/src/usb_descriptors.h b/examples/device/cdc_msc_hid_freertos/src/usb_descriptors.h
new file mode 100644
index 00000000..6992d334
--- /dev/null
+++ b/examples/device/cdc_msc_hid_freertos/src/usb_descriptors.h
@@ -0,0 +1,34 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef USB_DESCRIPTORS_H_
+#define USB_DESCRIPTORS_H_
+
+enum
+{
+  REPORT_ID_KEYBOARD = 1,
+  REPORT_ID_MOUSE
+};
+
+#endif /* USB_DESCRIPTORS_H_ */
diff --git a/examples/device/webusb_serial/src/usb_descriptors.h b/examples/device/webusb_serial/src/usb_descriptors.h
index d45e720d..d05843c3 100644
--- a/examples/device/webusb_serial/src/usb_descriptors.h
+++ b/examples/device/webusb_serial/src/usb_descriptors.h
@@ -1,7 +1,7 @@
 /* 
  * The MIT License (MIT)
  *
- * Copyright (c) 2019 hathach for Adafruit Industries
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal