diff --git a/lib/nfc/helpers/nfc_util.c b/lib/nfc/helpers/nfc_util.c
index 8cb6d57f..966f39de 100644
--- a/lib/nfc/helpers/nfc_util.c
+++ b/lib/nfc/helpers/nfc_util.c
@@ -35,6 +35,19 @@ uint64_t nfc_util_bytes2num(const uint8_t* src, uint8_t len) {
     return res;
 }
 
+uint64_t nfc_util_bytes2num_little_endian(const uint8_t* src, uint8_t len) {
+    furi_assert(src);
+    furi_assert(len <= 8);
+
+    uint64_t res = 0;
+    uint8_t shift = 0;
+    while(len--) {
+        res |= *src << (8 * shift++);
+        src++;
+    }
+    return res;
+}
+
 uint8_t nfc_util_even_parity32(uint32_t data) {
     // data ^= data >> 16;
     // data ^= data >> 8;
diff --git a/lib/nfc/helpers/nfc_util.h b/lib/nfc/helpers/nfc_util.h
index a9d5a3f8..39eb4017 100644
--- a/lib/nfc/helpers/nfc_util.h
+++ b/lib/nfc/helpers/nfc_util.h
@@ -10,6 +10,8 @@ void nfc_util_num2bytes(uint64_t src, uint8_t len, uint8_t* dest);
 
 uint64_t nfc_util_bytes2num(const uint8_t* src, uint8_t len);
 
+uint64_t nfc_util_bytes2num_little_endian(const uint8_t* src, uint8_t len);
+
 uint8_t nfc_util_even_parity32(uint32_t data);
 
 uint8_t nfc_util_odd_parity8(uint8_t data);
diff --git a/targets/f18/api_symbols.csv b/targets/f18/api_symbols.csv
index d684cc9e..c166e78e 100644
--- a/targets/f18/api_symbols.csv
+++ b/targets/f18/api_symbols.csv
@@ -1,5 +1,5 @@
 entry,status,name,type,params
-Version,+,49.2,,
+Version,+,49.3,,
 Header,+,applications/services/bt/bt_service/bt.h,,
 Header,+,applications/services/cli/cli.h,,
 Header,+,applications/services/cli/cli_vcp.h,,
diff --git a/targets/f7/api_symbols.csv b/targets/f7/api_symbols.csv
index 61c1903d..d4790843 100644
--- a/targets/f7/api_symbols.csv
+++ b/targets/f7/api_symbols.csv
@@ -1,5 +1,5 @@
 entry,status,name,type,params
-Version,+,49.2,,
+Version,+,49.3,,
 Header,+,applications/drivers/subghz/cc1101_ext/cc1101_ext_interconnect.h,,
 Header,+,applications/services/bt/bt_service/bt.h,,
 Header,+,applications/services/cli/cli.h,,
@@ -2488,6 +2488,7 @@ Function,+,nfc_set_mask_receive_time_fc,void,"Nfc*, uint32_t"
 Function,+,nfc_start,void,"Nfc*, NfcEventCallback, void*"
 Function,+,nfc_stop,void,Nfc*
 Function,+,nfc_util_bytes2num,uint64_t,"const uint8_t*, uint8_t"
+Function,+,nfc_util_bytes2num_little_endian,uint64_t,"const uint8_t*, uint8_t"
 Function,+,nfc_util_even_parity32,uint8_t,uint32_t
 Function,+,nfc_util_num2bytes,void,"uint64_t, uint8_t, uint8_t*"
 Function,+,nfc_util_odd_parity,void,"const uint8_t*, uint8_t*, uint8_t"