diff --git a/ha-smart-thermostat-control.yaml b/ha-smart-thermostat-control.yaml
index d512e2e..8d4f6c6 100644
--- a/ha-smart-thermostat-control.yaml
+++ b/ha-smart-thermostat-control.yaml
@@ -256,7 +256,7 @@ action:
               entity_id: !input thermostat
             data:
               # --- REVISED ACTION: Use the variable which holds the helper state ---
-              temperature: day_temp_input
+              temperature: "{{ day_temp_input }}"
               # --- END REVISED ACTION ---
               hvac_mode: heat
           - service: logbook.log