diff --git a/src/sunstone/models/OpenNebulaJSON/VirtualMachineJSON.rb b/src/sunstone/models/OpenNebulaJSON/VirtualMachineJSON.rb
index 7e7e328a34..80b0fe0c1d 100644
--- a/src/sunstone/models/OpenNebulaJSON/VirtualMachineJSON.rb
+++ b/src/sunstone/models/OpenNebulaJSON/VirtualMachineJSON.rb
@@ -81,8 +81,8 @@ module OpenNebulaJSON
                  when "recover"      then self.recover(action_hash['params'])
                  when "save_as_template" then self.save_as_template(action_hash['params'])
                  when "disk_resize"  then self.disk_resize(action_hash['params'])
-                 when "lock"         then self.lock(action_hash['params'])
-                 when "unlock"       then self.unlock(action_hash['params'])
+                 when "lock"         then self.lock(action_hash['params']['level'].to_i)
+                 when "unlock"       then self.unlock()
                  else
                      error_msg = "#{action_hash['perform']} action not " <<
                          " available for this resource"
@@ -201,14 +201,6 @@ module OpenNebulaJSON
             super(params['name'])
         end
 
-        def lock(params=Hash.new)
-            super(params['level'].to_i)
-        end
-
-        def unlock(params=Hash.new)
-            super()
-        end
-
         def recover(params=Hash.new)
             super(params['result'].to_i)
         end