diff --git a/applications/main/nfc/scenes/nfc_scene_mf_classic_dict_attack.c b/applications/main/nfc/scenes/nfc_scene_mf_classic_dict_attack.c
index 5ff014a1c..0286cf7a5 100644
--- a/applications/main/nfc/scenes/nfc_scene_mf_classic_dict_attack.c
+++ b/applications/main/nfc/scenes/nfc_scene_mf_classic_dict_attack.c
@@ -151,6 +151,7 @@ static void nfc_scene_mf_classic_dict_attack_prepare_view(NfcApp* instance) {
 
             if(!keys_dict_check_presence(furi_string_get_cstr(cuid_dict_path))) {
                 state = DictAttackStateUserDictInProgress;
+                furi_string_free(cuid_dict_path);
                 break;
             }
 
diff --git a/lib/nfc/protocols/mf_classic/mf_classic_poller.c b/lib/nfc/protocols/mf_classic/mf_classic_poller.c
index e8f660b16..7417322e9 100644
--- a/lib/nfc/protocols/mf_classic/mf_classic_poller.c
+++ b/lib/nfc/protocols/mf_classic/mf_classic_poller.c
@@ -20,8 +20,7 @@ const MfClassicBackdoorKeyPair mf_classic_backdoor_keys[] = {
     {{{0xa3, 0x16, 0x67, 0xa8, 0xce, 0xc1}}, MfClassicBackdoorAuth1}, // Fudan, Infineon, NXP
     {{{0x51, 0x8b, 0x33, 0x54, 0xe7, 0x60}}, MfClassicBackdoorAuth2}, // Fudan
 };
-const size_t mf_classic_backdoor_keys_count =
-    sizeof(mf_classic_backdoor_keys) / sizeof(mf_classic_backdoor_keys[0]);
+const size_t mf_classic_backdoor_keys_count = COUNT_OF(mf_classic_backdoor_keys);
 const uint16_t valid_sums[] =
     {0, 32, 56, 64, 80, 96, 104, 112, 120, 128, 136, 144, 152, 160, 176, 192, 200, 224, 256};