#define ST33ZP24_OK                                    0x5A
 #define ST33ZP24_UNDEFINED_ERR                         0x80
 #define ST33ZP24_BADLOCALITY                           0x81
-#define ST33ZP24_TISREGISTER_UKNOWN                    0x82
+#define ST33ZP24_TISREGISTER_UNKNOWN                   0x82
 #define ST33ZP24_LOCALITY_NOT_ACTIVATED                        0x83
 #define ST33ZP24_HASH_END_BEFORE_HASH_START            0x84
 #define ST33ZP24_BAD_COMMAND_ORDER                     0x85
                return 0;
        case ST33ZP24_UNDEFINED_ERR:
        case ST33ZP24_BADLOCALITY:
-       case ST33ZP24_TISREGISTER_UKNOWN:
+       case ST33ZP24_TISREGISTER_UNKNOWN:
        case ST33ZP24_LOCALITY_NOT_ACTIVATED:
        case ST33ZP24_HASH_END_BEFORE_HASH_START:
        case ST33ZP24_BAD_COMMAND_ORDER: