diff --git a/doc/api/readline.md b/doc/api/readline.md
index d34ca6e91e7f61..af5e3147d41f4d 100644
--- a/doc/api/readline.md
+++ b/doc/api/readline.md
@@ -356,6 +356,10 @@ async function processLineByLine() {
 }
 ```
 
+`readline.createInterface()` will start to consume the input stream once
+invoked. Having asynchronous operations between interface creation and
+asynchronous iteration may result in missed lines.
+
 ### `rl.line`
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