diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index a666becb050..34cb687c150 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -3589,7 +3589,6 @@ void wallet2::refresh(bool trusted_daemon, uint64_t start_height, uint64_t & blo
     }
     catch (const error::deprecated_rpc_access&)
     {
-      // no point in trying again, it'd just eat up credits
       THROW_WALLET_EXCEPTION_IF(!waiter.wait(), error::wallet_internal_error, "Exception in thread pool");
       throw;
     }
@@ -4049,12 +4048,15 @@ boost::optional<wallet2::keys_file_data> wallet2::get_keys_file_data(const epee:
     json.AddMember("original_view_secret_key", value, json.GetAllocator());
   }
   
+  // This value is serialized for compatibility with wallets which support the pay-to-use RPC system
   value2.SetInt(0);
   json.AddMember("persistent_rpc_client_id", value2, json.GetAllocator());
 
+  // This value is serialized for compatibility with wallets which support the pay-to-use RPC system
   value2.SetFloat(0.0f);
   json.AddMember("auto_mine_for_rpc_payment", value2, json.GetAllocator());
 
+  // This value is serialized for compatibility with wallets which support the pay-to-use RPC system
   value2.SetUint64(0);
   json.AddMember("credits_target", value2, json.GetAllocator());
 
diff --git a/src/wallet/wallet2.h b/src/wallet/wallet2.h
index 6c198969f19..f1c3d7c7e4c 100644
--- a/src/wallet/wallet2.h
+++ b/src/wallet/wallet2.h
@@ -1230,8 +1230,8 @@ namespace tools
       a & m_cold_key_images.parent();
       if(ver < 29)
         return;
-      crypto::secret_key m_rpc_client_secret_key; // Compatibility for old RPC payment system
-      a & m_rpc_client_secret_key;
+      crypto::secret_key dummy_rpc_client_secret_key; // Compatibility for old RPC payment system
+      a & dummy_rpc_client_secret_key;
       if(ver < 30)
       {
         m_has_ever_refreshed_from_node = false;
@@ -1267,8 +1267,8 @@ namespace tools
       FIELD(m_tx_device)
       FIELD(m_device_last_key_image_sync)
       FIELD(m_cold_key_images)
-      crypto::secret_key m_rpc_client_secret_key; // Compatibility for old RPC payment system
-      FIELD(m_rpc_client_secret_key)
+      crypto::secret_key dummy_rpc_client_secret_key; // Compatibility for old RPC payment system
+      FIELD_N("m_rpc_client_secret_key", dummy_rpc_client_secret_key)
       if (version < 1)
       {
         m_has_ever_refreshed_from_node = false;