diff --git a/lib/modules/storage/storageProcessesLauncher.js b/lib/modules/storage/storageProcessesLauncher.js
index d0220634..4d89b385 100644
--- a/lib/modules/storage/storageProcessesLauncher.js
+++ b/lib/modules/storage/storageProcessesLauncher.js
@@ -86,6 +86,8 @@ class StorageProcessesLauncher {
 
   launchProcess(storageName, callback) {
     const self = this;
+    callback = callback || function () {};
+
     if (self.processes[storageName]) {
       return callback(__('Storage process already started'));
     }