diff --git a/lib/_http_common.js b/lib/_http_common.js
index 6fc283e607633e..cacc04eaf7364e 100644
--- a/lib/_http_common.js
+++ b/lib/_http_common.js
@@ -62,7 +62,8 @@ function parserOnHeaders(headers, url) {
 function parserOnHeadersComplete(versionMajor, versionMinor, headers, method,
                                  url, statusCode, statusMessage, upgrade,
                                  shouldKeepAlive) {
-  var parser = this;
+  const parser = this;
+  const { socket } = parser;
 
   if (!headers) {
     headers = parser._headers;
@@ -75,10 +76,11 @@ function parserOnHeadersComplete(versionMajor, versionMinor, headers, method,
   }
 
   // Parser is also used by http client
-  var ParserIncomingMessage = parser.socket && parser.socket.server ?
-    parser.socket.server[kIncomingMessage] : IncomingMessage;
+  const ParserIncomingMessage = (socket && socket.server &&
+                                 socket.server[kIncomingMessage]) ||
+                                 IncomingMessage;
 
-  parser.incoming = new ParserIncomingMessage(parser.socket);
+  parser.incoming = new ParserIncomingMessage(socket);
   parser.incoming.httpVersionMajor = versionMajor;
   parser.incoming.httpVersionMinor = versionMinor;
   parser.incoming.httpVersion = `${versionMajor}.${versionMinor}`;