diff --git a/firmware/targets/f7/api_symbols.csv b/firmware/targets/f7/api_symbols.csv
index 3d7bd7cd..0e4af3c1 100644
--- a/firmware/targets/f7/api_symbols.csv
+++ b/firmware/targets/f7/api_symbols.csv
@@ -1880,7 +1880,7 @@ Function,-,mf_classic_dict_is_key_present,_Bool,"MfClassicDict*, uint8_t*"
 Function,-,mf_classic_dict_is_key_present_str,_Bool,"MfClassicDict*, FuriString*"
 Function,-,mf_classic_dict_rewind,_Bool,MfClassicDict*
 Function,-,mf_classic_emulator,_Bool,"MfClassicEmulator*, FuriHalNfcTxRxContext*"
-Function,-,mf_classic_get_classic_type,MfClassicType,"int8_t, uint8_t, uint8_t"
+Function,-,mf_classic_get_classic_type,MfClassicType,"uint8_t, uint8_t, uint8_t"
 Function,-,mf_classic_get_read_sectors_and_keys,void,"MfClassicData*, uint8_t*, uint8_t*"
 Function,-,mf_classic_get_sector_by_block,uint8_t,uint8_t
 Function,-,mf_classic_get_sector_trailer_block_num_by_sector,uint8_t,uint8_t
diff --git a/lib/nfc/protocols/mifare_classic.c b/lib/nfc/protocols/mifare_classic.c
index 2f340a5c..5887ab4c 100644
--- a/lib/nfc/protocols/mifare_classic.c
+++ b/lib/nfc/protocols/mifare_classic.c
@@ -367,7 +367,7 @@ bool mf_classic_check_card_type(uint8_t ATQA0, uint8_t ATQA1, uint8_t SAK) {
     }
 }
 
-MfClassicType mf_classic_get_classic_type(int8_t ATQA0, uint8_t ATQA1, uint8_t SAK) {
+MfClassicType mf_classic_get_classic_type(uint8_t ATQA0, uint8_t ATQA1, uint8_t SAK) {
     UNUSED(ATQA1);
     if((ATQA0 == 0x44 || ATQA0 == 0x04)) {
         if((SAK == 0x08 || SAK == 0x88)) {
diff --git a/lib/nfc/protocols/mifare_classic.h b/lib/nfc/protocols/mifare_classic.h
index 0346da0f..321ab5f0 100644
--- a/lib/nfc/protocols/mifare_classic.h
+++ b/lib/nfc/protocols/mifare_classic.h
@@ -96,7 +96,7 @@ const char* mf_classic_get_type_str(MfClassicType type);
 
 bool mf_classic_check_card_type(uint8_t ATQA0, uint8_t ATQA1, uint8_t SAK);
 
-MfClassicType mf_classic_get_classic_type(int8_t ATQA0, uint8_t ATQA1, uint8_t SAK);
+MfClassicType mf_classic_get_classic_type(uint8_t ATQA0, uint8_t ATQA1, uint8_t SAK);
 
 uint8_t mf_classic_get_total_sectors_num(MfClassicType type);