diff --git a/packages/backend/src/core/activitypub/models/ApQuestionService.ts b/packages/backend/src/core/activitypub/models/ApQuestionService.ts
index e3ded452cf..c5cec5a396 100644
--- a/packages/backend/src/core/activitypub/models/ApQuestionService.ts
+++ b/packages/backend/src/core/activitypub/models/ApQuestionService.ts
@@ -91,12 +91,14 @@ export class ApQuestionService {
 		if (question.type !== 'Question') throw new Error('object is not a Question');
 
 		const apChoices = question.oneOf ?? question.anyOf;
+		if (apChoices == null) throw new Error(''); // TODO
 
 		let changed = false;
 
 		for (const choice of poll.choices) {
 			const oldCount = poll.votes[poll.choices.indexOf(choice)];
-			const newCount = apChoices!.filter(ap => ap.name === choice)[0].replies!.totalItems;
+			const newCount = apChoices.filter(ap => ap.name === choice).at(0)?.replies?.totalItems;
+			if (newCount == null) throw new Error(''); // TODO
 
 			if (oldCount !== newCount) {
 				changed = true;