diff --git a/src/wallet/api/wallet.cpp b/src/wallet/api/wallet.cpp
index 99645189..963bbe0a 100644
--- a/src/wallet/api/wallet.cpp
+++ b/src/wallet/api/wallet.cpp
@@ -99,10 +99,10 @@ struct Wallet2CallbackImpl : public tools::i_wallet2_callback
         }
     }
 
-    virtual void on_money_received(uint64_t height, const cryptonote::transaction& tx, uint64_t amount)
+    virtual void on_money_received(uint64_t height, const crypto::hash &txid, uint64_t amount)
     {
 
-        std::string tx_hash =  epee::string_tools::pod_to_hex(get_transaction_hash(tx));
+        std::string tx_hash =  epee::string_tools::pod_to_hex(txid);
 
         LOG_PRINT_L3(__FUNCTION__ << ": money received. height:  " << height
                      << ", tx: " << tx_hash
@@ -114,10 +114,10 @@ struct Wallet2CallbackImpl : public tools::i_wallet2_callback
         }
     }
 
-    virtual void on_unconfirmed_money_received(uint64_t height, const cryptonote::transaction& tx, uint64_t amount)
+    virtual void on_unconfirmed_money_received(uint64_t height, const crypto::hash &txid, uint64_t amount)
     {
 
-        std::string tx_hash =  epee::string_tools::pod_to_hex(get_transaction_hash(tx));
+        std::string tx_hash =  epee::string_tools::pod_to_hex(txid);
 
         LOG_PRINT_L3(__FUNCTION__ << ": unconfirmed money received. height:  " << height
                      << ", tx: " << tx_hash
@@ -129,11 +129,11 @@ struct Wallet2CallbackImpl : public tools::i_wallet2_callback
         }
     }
 
-    virtual void on_money_spent(uint64_t height, const cryptonote::transaction& in_tx, uint64_t amount,
+    virtual void on_money_spent(uint64_t height, const crypto::hash &txid, uint64_t amount,
                                 const cryptonote::transaction& spend_tx)
     {
         // TODO;
-        std::string tx_hash = epee::string_tools::pod_to_hex(get_transaction_hash(spend_tx));
+        std::string tx_hash = epee::string_tools::pod_to_hex(txid);
         LOG_PRINT_L3(__FUNCTION__ << ": money spent. height:  " << height
                      << ", tx: " << tx_hash
                      << ", amount: " << print_money(amount));
@@ -144,7 +144,7 @@ struct Wallet2CallbackImpl : public tools::i_wallet2_callback
         }
     }
 
-    virtual void on_skip_transaction(uint64_t height, const cryptonote::transaction& tx)
+    virtual void on_skip_transaction(uint64_t height, const crypto::hash &txid)
     {
         // TODO;
     }
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 3b987c7d..888c158c 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -1029,7 +1029,7 @@ void wallet2::process_new_transaction(const crypto::hash &txid, const cryptonote
     payment.m_unlock_time  = tx.unlock_time;
     payment.m_timestamp    = ts;
     if (pool) {
-      m_unconfirmed_payments.emplace(txid(), payment);
+      m_unconfirmed_payments.emplace(txid, payment);
       if (0 != m_callback)
         m_callback->on_unconfirmed_money_received(height, txid, tx, payment.m_amount);
     }