1 files changed, 6 insertions, 0 deletions
diff --git a/lib/https.js b/lib/https.js
index 457327d6bb..fb22087259 100644
--- a/lib/https.js
+++ b/lib/https.js
@@ -34,6 +34,12 @@ const { urlToOptions, searchParamsSymbol } = require('internal/url');
 function Server(opts, requestListener) {
   if (!(this instanceof Server)) return new Server(opts, requestListener);
 
+  if (typeof opts === 'function') {
+    requestListener = opts;
+    opts = undefined;
+  }
+  opts = util._extend({}, opts);
+
   if (process.features.tls_npn && !opts.NPNProtocols) {
     opts.NPNProtocols = ['http/1.1', 'http/1.0'];
   }