2 files changed, 10 insertions, 2 deletions
diff --git a/src/wallet/api/wallet.cpp b/src/wallet/api/wallet.cpp
index 5819e42bc..440642291 100644
--- a/src/wallet/api/wallet.cpp
+++ b/src/wallet/api/wallet.cpp
@@ -50,6 +50,12 @@ namespace {
 struct Wallet2CallbackImpl : public tools::i_wallet2_callback
 {
 
+    Wallet2CallbackImpl()
+     : m_listener(nullptr)
+    {
+
+    }
+
     ~Wallet2CallbackImpl()
     {
 
@@ -109,6 +115,8 @@ struct Wallet2CallbackImpl : public tools::i_wallet2_callback
 
 Wallet::~Wallet() {}
 
+WalletListener::~WalletListener() {}
+
 string Wallet::displayAmount(uint64_t amount)
 {
     return cryptonote::print_money(amount);
diff --git a/src/wallet/wallet2_api.h b/src/wallet/wallet2_api.h
index d38fd6708..7841c299d 100644
--- a/src/wallet/wallet2_api.h
+++ b/src/wallet/wallet2_api.h
@@ -106,8 +106,8 @@ struct TransactionHistory
 struct WalletListener
 {
     virtual ~WalletListener() = 0;
-    virtual void moneySpent(const std::string &txId, uint64_t amount);
-    virtual void moneyReceived(const std::string &txId, uint64_t amount);
+    virtual void moneySpent(const std::string &txId, uint64_t amount) = 0;
+    virtual void moneyReceived(const std::string &txId, uint64_t amount) = 0;
     // TODO: on_skip_transaction;
 };