diff --git a/src/lib/services/epcSources.ts b/src/lib/services/epcSources.ts
index d1a77dc0..d644a1a9 100644
--- a/src/lib/services/epcSources.ts
+++ b/src/lib/services/epcSources.ts
@@ -355,7 +355,7 @@ async function resolveNewConditionReport(
     numberHeatedRooms: chosen.heatedRoomsCount ?? null,
     numberOpenFireplaces: chosen.openChimneysCount ?? null,
     numberExtensions: chosen.extensionsCount ?? null,
-    mainsGas: chosen.energyMainsGas ?? null,
+    mainsGas: chosen.energyGasConnectionAvailable ?? null,
     // GAP: no energy tariff in the new graph — omitted.
     energyTariff: null,
     currentEnergyDemand: sumKwh,