diff --git a/include/bitcoin/node/sessions/attach.hpp b/include/bitcoin/node/sessions/attach.hpp
index c6695bdf..c2761271 100644
--- a/include/bitcoin/node/sessions/attach.hpp
+++ b/include/bitcoin/node/sessions/attach.hpp
@@ -102,6 +102,18 @@ class attach
         channel->attach<protocol_transaction_out>(self)->start();
         channel->attach<protocol_observer>(self)->start();
     }
+
+    network::channel::ptr create_channel(const network::socket::ptr& socket,
+        bool quiet) NOEXCEPT override
+    {
+        // TODO: replace message memory resource (affects only block messages).
+        static network::memory memory{};
+
+        // Channel id must be created using create_key().
+        const auto id = network::session::create_key();
+        return std::make_shared<network::channel>(memory, network::session::log,
+            socket, network::session::settings(), id, quiet);
+    }
 };
 
 } // namespace node
diff --git a/src/protocols/protocol_block_in_31800.cpp b/src/protocols/protocol_block_in_31800.cpp
index bd68b95c..5e3a43e1 100644
--- a/src/protocols/protocol_block_in_31800.cpp
+++ b/src/protocols/protocol_block_in_31800.cpp
@@ -375,7 +375,7 @@ bool protocol_block_in_31800::handle_receive_block(const code& ec,
     notify(ec, chase::checked, height);
     fire(events::block_archived, height);
 
-    count(message->cached_size);
+    count(size);
     map_->erase(it);
     if (is_idle())
     {