Instead of using ssl options with a boolean value for spdy, just use …

…spdy options object

lib/cluster/worker.js

@@ -36,15 +36,10 @@ Worker.prototype = new (function () {
     var ssl = this.config.ssl
       , spdy = this.config.spdy;
 
+    // If SSL options were given
     if (ssl) {
       if (ssl.cert && ssl.key) {
-        if(spdy) {
-          this.server = utils.file.requireLocal('spdy');
-        } else {
-          this.server = require('https');
-        }
-
-        this.server = this.server.createServer({
+        this.server = require('https').createServer({
             key: fs.readFileSync(ssl.key)
           , cert: fs.readFileSync(ssl.cert)
         });
@@ -54,6 +49,20 @@ Worker.prototype = new (function () {
             'Missing certificate or private key.');
       }
     }
+    // If SPDY options were given
+    else if (spdy) {
+      if (spdy.cert && spdy.key) {
+        this.server = utils.file.requireLocal('spdy').createServer({
+            key: fs.readFileSync(spdy.key)
+          , cert: fs.readFileSync(spdy.cert)
+        });
+      }
+      else {
+        this.log.error('Cannot start server using SPDY.' +
+            'Missing certificate or private key.');
+      }
+    }
+    // If neither SSL or SPDY options were given use HTTP
     else {
       this.server = require('http').createServer();
     }