diff --git a/packages/backend/src/core/RelayService.ts b/packages/backend/src/core/RelayService.ts
index edf4ffc2e1..ad01f98902 100644
--- a/packages/backend/src/core/RelayService.ts
+++ b/packages/backend/src/core/RelayService.ts
@@ -125,7 +125,7 @@ export class RelayService {
 		const copy = deepClone(activity);
 		if (!copy.to) copy.to = ['https://www.w3.org/ns/activitystreams#Public'];
 		privateKey = privateKey ?? await this.userKeypairService.getLocalUserPrivateKeyPem(user.id);
-		const signed = await this.apRendererService.attachLdSignature(copy, user, privateKey);
+		const signed = await this.apRendererService.attachLdSignature(copy, privateKey);
 
 		this.queueService.deliverMany(user, signed, new Map(relays.map(({ inbox }) => [inbox, false])), privateKey);
 	}
diff --git a/packages/backend/src/core/activitypub/ApRendererService.ts b/packages/backend/src/core/activitypub/ApRendererService.ts
index 34a9826fb3..5d7419f934 100644
--- a/packages/backend/src/core/activitypub/ApRendererService.ts
+++ b/packages/backend/src/core/activitypub/ApRendererService.ts
@@ -625,9 +625,7 @@ export class ApRendererService {
 	}
 
 	@bindThis
-	public async attachLdSignature(activity: any, user: { id: MiUser['id']; host: null; }, key: PrivateKeyWithPem): Promise<IActivity> {
-		const keypair = await this.userKeypairService.getUserKeypair(user.id);
-
+	public async attachLdSignature(activity: any, key: PrivateKeyWithPem): Promise<IActivity> {
 		const jsonLd = this.jsonLdService.use();
 		jsonLd.debug = false;
 		activity = await jsonLd.signRsaSignature2017(activity, key.privateKeyPem, key.keyId);