diff --git a/web/src/views/settings/MasksAndZonesView.tsx b/web/src/views/settings/MasksAndZonesView.tsx
index 5c74a121b..4e649a3cd 100644
--- a/web/src/views/settings/MasksAndZonesView.tsx
+++ b/web/src/views/settings/MasksAndZonesView.tsx
@@ -240,7 +240,8 @@ export default function MasksAndZonesView({
             scaledWidth,
             scaledHeight,
           ),
-          distances: zoneData.distances.map((distance) => parseFloat(distance)),
+          distances:
+            zoneData.distances?.map((distance) => parseFloat(distance)) ?? [],
           isFinished: true,
           color: zoneData.color,
         }),