diff --git a/doc/api/readline.md b/doc/api/readline.md
index bff9cb1ba296a8..a6751441010f94 100644
--- a/doc/api/readline.md
+++ b/doc/api/readline.md
@@ -82,6 +82,9 @@ The `'line'` event is emitted whenever the `input` stream receives an
 end-of-line input (`\n`, `\r`, or `\r\n`). This usually occurs when the user
 presses <kbd>Enter</kbd> or <kbd>Return</kbd>.
 
+The `'line'` event is also emitted if new data has been read from a stream and
+that stream ends without a final end-of-line marker.
+
 The listener function is called with a string containing the single line of
 received input.