diff --git a/lib/server.js b/lib/server.js
index 4065e18d1..597f2cc93 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -172,6 +172,7 @@ function Server(options) {
         );
 
         this.http2 = true;
+        this.secure = true;
         this.server = http2.createSecureServer(options.http2);
     } else if ((options.cert || options.certificate) && options.key) {
         this.ca = options.ca;
@@ -191,6 +192,7 @@ function Server(options) {
             secureOptions: options.secureOptions
         });
     } else if (options.httpsServerOptions) {
+        this.secure = true;
         this.server = https.createServer(options.httpsServerOptions);
     } else {
         this.server = http.createServer();