diff --git a/zebra-network/src/peer/handshake.rs b/zebra-network/src/peer/handshake.rs
index af7ec7fd..7ae1f011 100644
--- a/zebra-network/src/peer/handshake.rs
+++ b/zebra-network/src/peer/handshake.rs
@@ -489,6 +489,8 @@ where
                                             let _ =
                                                 tx.send(Err(PeerError::ConnectionClosed.into()));
                                         } else if e.is_full() {
+                                            // TODO: wait for the sink to be ready, or wait for a timeout,
+                                            // then close the connection with an overloaded error (#1551)
                                             let ClientRequest { tx, .. } = e.into_inner();
                                             let _ = tx.send(Err(PeerError::Overloaded.into()));
                                         } else {