diff --git a/lib/modules/swarm/index.js b/lib/modules/swarm/index.js
index 130ff9d8b..8c3531706 100644
--- a/lib/modules/swarm/index.js
+++ b/lib/modules/swarm/index.js
@@ -93,9 +93,9 @@ class Swarm {
     return storageProcessesLauncher.launchProcess('swarm', callback);
   }
 
-  registerUploadCommand(cb) {
+  registerUploadCommand() {
     const self = this;
-    this.embark.registerUploadCommand('swarm', () => {
+    this.embark.registerUploadCommand('swarm', (cb) => {
       let upload_swarm = new UploadSwarm({
         buildDir: self.buildDir || 'dist/',
         storageConfig: self.storageConfig,