diff --git a/lib/core/request.js b/lib/core/request.js
index 78003038ba9..e4f05ad12da 100644
--- a/lib/core/request.js
+++ b/lib/core/request.js
@@ -183,7 +183,7 @@ class Request {
 
     validateHandler(handler, method, upgrade)
 
-    this.servername = servername || getServerName(this.host)
+    this.servername = servername || getServerName(this.host) || null
 
     this[kHandler] = handler