diff --git a/include/protocols.h b/include/protocols.h
index 58b992717..516cdf7d3 100644
--- a/include/protocols.h
+++ b/include/protocols.h
@@ -178,6 +178,7 @@ ISO 7816-4 Basic interindustry commands. For command APDU's.
 #define ISO14443A_CMD_RATS          0xE0
 #define ISO14443A_CMD_PPS           0xD0
 #define ISO14443A_CMD_NXP_DESELECT  0xC2
+#define ISO14443A_CMD_WTX           0xF2
 
 #define MIFARE_SELECT_CT            0x88
 #define MIFARE_AUTH_KEYA            0x60