diff --git a/src/im_mad/ec2/one_im_ec2.rb b/src/im_mad/ec2/one_im_ec2.rb
index d9bc8582ad..3f6c7c5b90 100755
--- a/src/im_mad/ec2/one_im_ec2.rb
+++ b/src/im_mad/ec2/one_im_ec2.rb
@@ -65,7 +65,7 @@ class EC2InformationManagerDriver < OpenNebulaDriver
     #---------------------------------------------------------------------------
     # The monitor action, just print the capacity info and hostname
     #---------------------------------------------------------------------------
-    def action_monitor(num,host)
+    def action_monitor(num,host,not_used)
        send_message("MONITOR",RESULT[:success],num,"HOSTNAME=#{host},#{@info}")
     end
 end