diff --git a/lib/nfc/protocols/mf_classic/mf_classic_poller.c b/lib/nfc/protocols/mf_classic/mf_classic_poller.c
index 8d3a1ee74..bc502534f 100644
--- a/lib/nfc/protocols/mf_classic/mf_classic_poller.c
+++ b/lib/nfc/protocols/mf_classic/mf_classic_poller.c
@@ -1833,6 +1833,7 @@ NfcCommand mf_classic_poller_handler_nested_controller(MfClassicPoller* instance
             }
             dict_attack_ctx->nested_phase = MfClassicNestedPhaseAnalyzePRNG;
         } else {
+            dict_attack_ctx->nested_known_key = dict_attack_ctx->current_key;
             dict_attack_ctx->nested_known_key_sector = 0;
             dict_attack_ctx->nested_known_key_type = MfClassicKeyTypeA;
             dict_attack_ctx->prng_type = MfClassicPrngTypeWeak;
diff --git a/targets/f18/api_symbols.csv b/targets/f18/api_symbols.csv
index 7943c4cfc..be60c6a1c 100644
--- a/targets/f18/api_symbols.csv
+++ b/targets/f18/api_symbols.csv
@@ -1,5 +1,5 @@
 entry,status,name,type,params
-Version,+,77.2,,
+Version,+,77.3,,
 Header,+,applications/services/bt/bt_service/bt.h,,
 Header,+,applications/services/bt/bt_service/bt_keys_storage.h,,
 Header,+,applications/services/cli/cli.h,,