diff --git a/packages/backend/src/core/activitypub/ApResolverService.ts b/packages/backend/src/core/activitypub/ApResolverService.ts
index 8ead29a5f2..7e962cb127 100644
--- a/packages/backend/src/core/activitypub/ApResolverService.ts
+++ b/packages/backend/src/core/activitypub/ApResolverService.ts
@@ -38,7 +38,8 @@ export class Resolver {
 		private recursionLimit = 100,
 	) {
 		this.history = new Set();
-		this.logger = this.loggerService.getLogger('ap-resolve'); // なぜか TypeError: Cannot read properties of undefined (reading 'getLogger') と言われる
+		// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+		this.logger = this.loggerService?.getLogger('ap-resolve'); // なぜか TypeError: Cannot read properties of undefined (reading 'getLogger') と言われる
 	}
 
 	@bindThis