diff --git a/hub/catalog_factories/energy_systems/montreal_custom_catalog.py b/hub/catalog_factories/energy_systems/montreal_custom_catalog.py
index 8d2eb256..bf47d19b 100644
--- a/hub/catalog_factories/energy_systems/montreal_custom_catalog.py
+++ b/hub/catalog_factories/energy_systems/montreal_custom_catalog.py
@@ -111,7 +111,10 @@ class MontrealCustomCatalog(Catalog):
         distribution_consumption_variable_flow = float(
           equipment['distribution_consumption_variable_flow']['#text']) / 100
 
-      emission_equipment = equipment['dissipation_id']
+      emission_equipment = -1
+      if 'dissipation_id' in equipment:
+        emission_equipment = equipment['dissipation_id']
+
       _emission_equipments = None
       for equipment_archetype in self._catalog_emission_equipments:
         if int(equipment_archetype.id) == int(emission_equipment):