diff --git a/app/src/evm/tx_eth.c b/app/src/evm/tx_eth.c
index 203bbe2..911b830 100644
--- a/app/src/evm/tx_eth.c
+++ b/app/src/evm/tx_eth.c
@@ -26,7 +26,7 @@
 
 static parser_context_t ctx_parsed_tx;
 
-const char *tx_parse_eth() {
+const char *tx_parse_eth(uint8_t *error_code) {
     uint8_t err = parser_parse_eth(&ctx_parsed_tx, tx_get_buffer(), tx_get_buffer_length());
 
     CHECK_APP_CANARY()
@@ -38,6 +38,7 @@ const char *tx_parse_eth() {
     err = parser_validate_eth(&ctx_parsed_tx);
     CHECK_APP_CANARY()
 
+    *error_code = err;
     if (err != parser_ok) {
         return parser_getErrorDescription(err);
     }
diff --git a/app/src/evm/tx_eth.h b/app/src/evm/tx_eth.h
index 57193a5..6d9d323 100644
--- a/app/src/evm/tx_eth.h
+++ b/app/src/evm/tx_eth.h
@@ -22,7 +22,7 @@
 /// Parse message stored in transaction buffer
 /// This function should be called as soon as full buffer data is loaded.
 /// \return It returns NULL if data is valid or error message otherwise.
-const char *tx_parse_eth();
+const char *tx_parse_eth(uint8_t *error_code);
 
 /// Return the number of items in the transaction
 zxerr_t tx_getNumItemsEth(uint8_t *num_items);