diff --git a/lib/readline.js b/lib/readline.js
index 9e7e1b21ec8ffa..8c02a89567489b 100644
--- a/lib/readline.js
+++ b/lib/readline.js
@@ -823,6 +823,8 @@ function _ttyWriteDumb(s, key) {
       // This readline instance is finished
       this.close();
     }
+
+    return;
   }
 
   switch (key.name) {