diff --git a/src/emuvim/dcemulator/monitoring.py b/src/emuvim/dcemulator/monitoring.py
index 80b139c..074506b 100755
--- a/src/emuvim/dcemulator/monitoring.py
+++ b/src/emuvim/dcemulator/monitoring.py
@@ -348,6 +348,7 @@
                 data = {}
 
                 data['cookie'] = flow_dict['cookie']
+                data['cookie_mask'] = flow_dict['cookie']
 
                 if 'tx' in flow_dict['metric_key']:
                     data['match'] = {'in_port':flow_dict['mon_port']}