diff --git a/examples/mifare-desfire-write-ndef.c b/examples/mifare-desfire-write-ndef.c
index d29ad47..101bced 100644
--- a/examples/mifare-desfire-write-ndef.c
+++ b/examples/mifare-desfire-write-ndef.c
@@ -34,7 +34,8 @@
 
 uint8_t key_data_null[8]  = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 
-const uint8_t ndef_msg[33] = {
+const uint8_t ndef_msg[35] = {
+    0x00, 0x21,
     0xd1, 0x02, 0x1c, 0x53, 0x70, 0x91, 0x01, 0x09,
     0x54, 0x02, 0x65, 0x6e, 0x4c, 0x69, 0x62, 0x6e,
     0x66, 0x63, 0x51, 0x01, 0x0b, 0x55, 0x03, 0x6c,