diff --git a/client/src/mifare/mfkey.c b/client/src/mifare/mfkey.c
index 0d905a65e..181818978 100644
--- a/client/src/mifare/mfkey.c
+++ b/client/src/mifare/mfkey.c
@@ -151,7 +151,7 @@ bool mfkey32_moebius(nonces_t *data, uint64_t *outputkey) {
         if (data->ar2 == (crypto1_word(t, 0, 0) ^ p641)) {
             outkey = key;
             ++counter;
-            if (counter == 20) break;
+            if (counter == 2) break;
         }
     }
     isSuccess  = (counter == 1);