diff --git a/include/bitcoin/node/channels/channel_peer.hpp b/include/bitcoin/node/channels/channel_peer.hpp
index 30aa451b..736543dd 100644
--- a/include/bitcoin/node/channels/channel_peer.hpp
+++ b/include/bitcoin/node/channels/channel_peer.hpp
@@ -52,6 +52,7 @@ class BCN_API channel_peer
 
 private:
     // This is protected by strand.
+    // boost::circular_buffer is included by network.
     boost::circular_buffer<system::hash_digest> announced_;
 };
 
diff --git a/include/bitcoin/node/define.hpp b/include/bitcoin/node/define.hpp
index 59f583d9..6fe8d4be 100644
--- a/include/bitcoin/node/define.hpp
+++ b/include/bitcoin/node/define.hpp
@@ -23,7 +23,6 @@
 #include <memory>
 #include <utility>
 #include <variant>
-#include <boost/circular_buffer.hpp>
 
 /// Pulls in common /node headers (excluding settings/config/parser/full_node).
 #include <bitcoin/node/chase.hpp>