diff --git a/recommendations/optimiser/optimiser_functions.py b/recommendations/optimiser/optimiser_functions.py
index 6159b930..d6353eea 100644
--- a/recommendations/optimiser/optimiser_functions.py
+++ b/recommendations/optimiser/optimiser_functions.py
@@ -22,7 +22,7 @@ def prepare_input_measures(property_recommendations, goal):
             # if the recommendation is a solar recommendation without a battery, we exclude it from the optimisation.
             # That will ensure that the optimiser only considers solar recommendations with batteries, so we don't
             # under-report the potential cost
-            recs = [r for r in recs if recs["has_battery"]]
+            recs = [r for r in recs if r["has_battery"]]
 
         input_measures.append(
             [