diff --git a/packages/backend/src/core/PushNotificationService.ts b/packages/backend/src/core/PushNotificationService.ts
index 75bf4b0e0..4b7ca5c96 100644
--- a/packages/backend/src/core/PushNotificationService.ts
+++ b/packages/backend/src/core/PushNotificationService.ts
@@ -23,7 +23,7 @@ type pushNotificationsTypes = {
 
 // Reduce length because push message servers have character limits
 function truncateBody<T extends keyof pushNotificationsTypes>(type: T, body: pushNotificationsTypes[T]): pushNotificationsTypes[T] {
-	if (body === undefined) return body;
+	if (typeof body !== 'object') return body;
 
 	return {
 		...body,
diff --git a/packages/backend/src/server/api/ApiCallService.ts b/packages/backend/src/server/api/ApiCallService.ts
index cc27b3696..347fa59d3 100644
--- a/packages/backend/src/server/api/ApiCallService.ts
+++ b/packages/backend/src/server/api/ApiCallService.ts
@@ -108,9 +108,9 @@ export class ApiCallService implements OnApplicationShutdown {
 		const [path] = await createTemp();
 		await pump(multipartData.file, fs.createWriteStream(path));
 
-		const fields = {} as Record<string, string | undefined>;
+		const fields = {} as Record<string, unknown>;
 		for (const [k, v] of Object.entries(multipartData.fields)) {
-			fields[k] = v.value;
+			fields[k] = typeof v === 'object' && 'value' in v ? v.value : undefined;
 		}
 
 		const token = fields['i'];
diff --git a/packages/backend/src/server/api/GetterService.ts b/packages/backend/src/server/api/GetterService.ts
index c7f9916f9..c94884a78 100644
--- a/packages/backend/src/server/api/GetterService.ts
+++ b/packages/backend/src/server/api/GetterService.ts
@@ -2,7 +2,7 @@ import { Inject, Injectable } from '@nestjs/common';
 import { DI } from '@/di-symbols.js';
 import type { NotesRepository, UsersRepository } from '@/models/index.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
-import type { User } from '@/models/entities/User.js';
+import type { LocalUser, RemoteUser, User } from '@/models/entities/User.js';
 import type { Note } from '@/models/entities/Note.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { bindThis } from '@/decorators.js';
@@ -45,7 +45,7 @@ export class GetterService {
 			throw new IdentifiableError('15348ddd-432d-49c2-8a5a-8069753becff', 'No such user.');
 		}
 
-		return user;
+		return user as LocalUser | RemoteUser;
 	}
 
 	/**