diff --git a/backend/Property.py b/backend/Property.py
index 0df29405..88bee6dc 100644
--- a/backend/Property.py
+++ b/backend/Property.py
@@ -1262,6 +1262,7 @@ class Property:
             "biodiesel": "Smokeless Fuel",
             "b30d": "B30K Biofuel",
             "coal": "Coal",
+            "oil": "Oil"
         }
 
         self.heating_energy_source = list({