diff --git a/lib/transport_helper.dart b/lib/transport_helper.dart
index f3bc074..2c8f8bf 100644
--- a/lib/transport_helper.dart
+++ b/lib/transport_helper.dart
@@ -339,7 +339,7 @@ class Station {
   }
 
   factory Station.fromJson(Map<String, dynamic> json) => Station(
-    id: json["id"] as String? ?? json["extId"] as String,
+    id: json["id"] ?? json["extId"] as String,
     name: json["name"],
     transportLines: json.containsKey("productAtStop")
         ? json["productAtStop"].map(