diff --git a/src/mad/ruby/VirtualMachineDriver.rb b/src/mad/ruby/VirtualMachineDriver.rb
index 06240a8ac1..fa3249824d 100644
--- a/src/mad/ruby/VirtualMachineDriver.rb
+++ b/src/mad/ruby/VirtualMachineDriver.rb
@@ -118,37 +118,37 @@ class VirtualMachineDriver < OpenNebulaDriver
     end
 
     # Virtual Machine Manager Protocol Actions (generic implementation)
-    def deploy(id, host, remote_dfile, not_used)
+    def deploy(id, drv_message)
         error = "Action not implemented by driver #{self.class}"
         send_message(ACTION[:deploy],RESULT[:failure],id,error)
     end
 
-    def shutdown(id, host, deploy_id, not_used)
+    def shutdown(id, drv_message)
         error = "Action not implemented by driver #{self.class}"
         send_message(ACTION[:shutdown],RESULT[:failure],id,error)
     end
 
-    def cancel(id, host, deploy_id, not_used)
+    def cancel(id, drv_message)
         error = "Action not implemented by driver #{self.class}"
         send_message(ACTION[:cancel],RESULT[:failure],id,error)
     end
 
-    def save(id, host, deploy_id, file)
+    def save(id, drv_message)
         error = "Action not implemented by driver #{self.class}"
         send_message(ACTION[:save],RESULT[:failure],id,error)
     end
 
-    def restore(id, host, deploy_id, file)
+    def restore(id, drv_message)
         error = "Action not implemented by driver #{self.class}"
         send_message(ACTION[:restore],RESULT[:failure],id,error)
     end
 
-    def migrate(id, host, deploy_id, dest_host)
+    def migrate(id, drv_message)
         error = "Action not implemented by driver #{self.class}"
         send_message(ACTION[:migrate],RESULT[:failure],id,error)
     end
 
-    def poll(id, host, deploy_id, not_used)
+    def poll(id, drv_message)
         error = "Action not implemented by driver #{self.class}"
         send_message(ACTION[:poll],RESULT[:failure],id,error)
     end