diff --git a/armsrc/mifaresim.c b/armsrc/mifaresim.c
index 0fbfecb85..8472ba98e 100644
--- a/armsrc/mifaresim.c
+++ b/armsrc/mifaresim.c
@@ -739,16 +739,6 @@ void Mifare1ksim(uint16_t flags, uint8_t exitAfterNReads, uint8_t *datain, uint1
                     // RCV: 61 XX => Using KEY B
                     // XX: Block number
 
-                    // iceman,  u8 can never be larger than 256
-                    // if authenticating to a block that shouldn't exist - as long as we are not doing the reader attack
-                    if (((flags & FLAG_NR_AR_ATTACK) != FLAG_NR_AR_ATTACK)) {
-                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                        FpgaDisableTracing();
-
-                        if (DBGLEVEL >= DBG_EXTENDED) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking", receivedCmd_dec[0], receivedCmd_dec[1], receivedCmd_dec[1]);
-                        break;
-                    }
-
                     authTimer = GetTickCount();
 
                     // received block num -> sector