diff --git a/monkey/monkey_island/cc/models/monkey.py b/monkey/monkey_island/cc/models/monkey.py
index 520b967a0..0b910c84b 100644
--- a/monkey/monkey_island/cc/models/monkey.py
+++ b/monkey/monkey_island/cc/models/monkey.py
@@ -32,6 +32,7 @@ class Monkey(Document):
     critical_services = ListField(StringField())
     pba_results = ListField()
     ttl_ref = ReferenceField(MonkeyTtl)
+    tunnel = ReferenceField("self")
 
     # LOGIC
     @staticmethod