diff --git a/examples/device/mtp/src/main.c b/examples/device/mtp/src/main.c
index 709aeb16f..57d1535b2 100644
--- a/examples/device/mtp/src/main.c
+++ b/examples/device/mtp/src/main.c
@@ -59,10 +59,7 @@ int main(void) {
     .speed = TUSB_SPEED_AUTO
   };
   tusb_init(BOARD_TUD_RHPORT, &dev_init);
-
-  if (board_init_after_tusb) {
-    board_init_after_tusb();
-  }
+  board_init_after_tusb();
 
   while (1) {
     tud_task(); // tinyusb device task
diff --git a/examples/device/mtp/src/mtp_fs_example.c b/examples/device/mtp/src/mtp_fs_example.c
index 09a5f4ffc..d47ec41b8 100644
--- a/examples/device/mtp/src/mtp_fs_example.c
+++ b/examples/device/mtp/src/mtp_fs_example.c
@@ -36,8 +36,6 @@
 #define DEV_INFO_MANUFACTURER   "TinyUSB"
 #define DEV_INFO_MODEL          "MTP Example"
 #define DEV_INFO_VERSION        "1.0"
-#define DEV_INFO_SERIAL         "123456"
-
 #define DEV_PROP_FRIENDLY_NAME  "TinyUSB MTP"
 
 //------------- storage info -------------//