diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index ad4df265..c2c01ca6 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -58,6 +58,8 @@ using namespace currency;
 #define WALLET_MIN_UTXO_COUNT_FOR_DEFRAGMENTATION_TX                  3   // TODO: @#@# consider descreasing to mimic normal tx
 #define WALLET_MAX_UTXO_COUNT_FOR_DEFRAGMENTATION_TX                  10  // TODO: @#@# consider descreasing to mimic normal tx
 
+#define WALLET_TX_MAX_ALLOWED_FEE                                     (COIN * 100)
+
 #undef LOG_DEFAULT_CHANNEL
 #define LOG_DEFAULT_CHANNEL "wallet"
 ENABLE_CHANNEL_BY_DEFAULT("wallet")
@@ -7125,6 +7127,8 @@ void wallet2::finalize_transaction(currency::finalize_tx_param& ftp, currency::f
     ftp, result);
   //TIME_MEASURE_FINISH_MS(construct_tx_time);
   THROW_IF_FALSE_WALLET_EX(r, error::tx_not_constructed, ftp.sources, ftp.prepared_destinations, ftp.unlock_time);
+  uint64_t effective_fee = get_tx_fee(result.tx);
+  THROW_IF_FALSE_WALLET_CMN_ERR_EX(effective_fee <= WALLET_TX_MAX_ALLOWED_FEE, "tx fee is WAY too big: " << print_money_brief(effective_fee) << ", max allowed is " << print_money_brief(WALLET_TX_MAX_ALLOWED_FEE));
 
   //TIME_MEASURE_START_MS(sign_ms_input_time);
   if (ftp.multisig_id != currency::null_hash)