diff --git a/src/graphics/CommonGraphics.ts b/src/graphics/CommonGraphics.ts
index 72d9bfe..3055108 100644
--- a/src/graphics/CommonGraphics.ts
+++ b/src/graphics/CommonGraphics.ts
@@ -85,7 +85,7 @@ export function createRelatedRefProto(
     [TrainWindow.Type, graphicData.RelatedRef.DeviceType.TrainWindow],
   ]);
   const protoDeviceType = typeMap.get(type);
-  if (!protoDeviceType) throw Error(`输入的type有误: ${type}`);
+  if (protoDeviceType !== undefined) throw Error(`输入的type有误: ${type}`);
   const protoData = new graphicData.RelatedRef({
     deviceType: protoDeviceType,
     id,