diff --git a/lib/_tls_legacy.js b/lib/_tls_legacy.js
index c2bbb973cfbe31..7beec4805c1b8b 100644
--- a/lib/_tls_legacy.js
+++ b/lib/_tls_legacy.js
@@ -632,6 +632,8 @@ function onhandshakestart() {
     // state machine and OpenSSL is not re-entrant. We cannot allow the user's
     // callback to destroy the connection right now, it would crash and burn.
     setImmediate(function() {
+      // Old-style error is not being migrated to the newer style
+      // internal/errors.js because _tls_legacy.js has been deprecated.
       var err = new Error('TLS session renegotiation attack detected');
       if (self.cleartext) self.cleartext.emit('error', err);
     });