diff --git a/amqprs/src/net/reader_handler.rs b/amqprs/src/net/reader_handler.rs
index 723cd0b..a9d6ad6 100644
--- a/amqprs/src/net/reader_handler.rs
+++ b/amqprs/src/net/reader_handler.rs
@@ -21,6 +21,7 @@ use super::{
 
 /////////////////////////////////////////////////////////////////////////////
 
+/// After two missed heartbeats, the peer is considered to be unreachable according to [spec](https://www.rabbitmq.com/docs/heartbeats#heartbeats-interval)
 const MAX_HEARTBEAT_MISS: u64 = 2;
 
 pub(crate) struct ReaderHandler {