diff --git a/src/currency_core/currency_format_utils.cpp b/src/currency_core/currency_format_utils.cpp
index d76c2768..1ab42769 100644
--- a/src/currency_core/currency_format_utils.cpp
+++ b/src/currency_core/currency_format_utils.cpp
@@ -1595,7 +1595,8 @@ namespace currency
   bool lookup_acc_outs(const account_keys& acc, const transaction& tx, const crypto::public_key& tx_pub_key, std::vector<size_t>& outs, uint64_t& money_transfered, crypto::key_derivation& derivation)
   {
     money_transfered = 0;
-    generate_key_derivation(tx_pub_key, acc.m_view_secret_key, derivation);
+    bool r = generate_key_derivation(tx_pub_key, acc.m_view_secret_key, derivation);
+    CHECK_AND_ASSERT_MES(r, false, "unable to generate derivation from tx_pub = " << tx_pub_key << " * view_sec, invalid tx_pub?");
 
     if (is_coinbase(tx) && get_block_height(tx) == 0 &&  tx_pub_key == ggenesis_tx_pub_key)
     {