diff --git a/src/cli/one_helper/oneuser_helper.rb b/src/cli/one_helper/oneuser_helper.rb
index 48b87abead..187e8f8584 100644
--- a/src/cli/one_helper/oneuser_helper.rb
+++ b/src/cli/one_helper/oneuser_helper.rb
@@ -37,7 +37,7 @@ class OneUserHelper < OpenNebulaHelper::OneHelper
                 return -1, "Can not read file: #{arg}"
             end
         else
-            password = arg
+            password = arg.dup
         end
 
         if options[:driver] == OpenNebula::User::X509_AUTH