diff --git a/api/pages/project/title.ts b/api/pages/project/title.ts
index 18c5eb1..ed13077 100644
--- a/api/pages/project/title.ts
+++ b/api/pages/project/title.ts
@@ -167,7 +167,7 @@ export interface Page<HasInfoboxDefinition extends boolean = false>
   /** ページ内に含まれる、scrapbox.ioにアップロードしたファイルのfile id */
   files: string[];
 
-  infoboxDefinition: HasInfoboxDefinition extends true ? [] : string[];
+  infoboxDefinition: HasInfoboxDefinition extends true ? string[] : [];
 
   infoboxResult: InfoboxResult[];