diff --git a/project/src/services/SeasonalEventService.ts b/project/src/services/SeasonalEventService.ts
index b3c8a4b1..18371781 100644
--- a/project/src/services/SeasonalEventService.ts
+++ b/project/src/services/SeasonalEventService.ts
@@ -760,7 +760,7 @@ export class SeasonalEventService {
             }
 
             const mapData: ILocation = maps[mapName];
-            if (typeof mapData.base.Events.Khorovod?.Chance !== "undefined") {
+            if (typeof mapData.base?.Events?.Khorovod?.Chance !== "undefined") {
                 mapData.base.Events.Khorovod.Chance = 100;
             }
         }