diff --git a/src/abstractions/sync.service.ts b/src/abstractions/sync.service.ts
index a3287c39c9..ef4b4e8dc8 100644
--- a/src/abstractions/sync.service.ts
+++ b/src/abstractions/sync.service.ts
@@ -1,9 +1,9 @@
-export interface SyncService {
+export abstract class SyncService {
     syncInProgress: boolean;
 
-    getLastSync(): Promise<Date>;
-    setLastSync(date: Date): Promise<any>;
-    syncStarted(): void;
-    syncCompleted(successfully: boolean): void;
-    fullSync(forceSync: boolean): Promise<boolean>;
+    getLastSync: () => Promise<Date>;
+    setLastSync: (date: Date) => Promise<any>;
+    syncStarted: () => void;
+    syncCompleted: (successfully: boolean) => void;
+    fullSync: (forceSync: boolean) => Promise<boolean>;
 }
diff --git a/src/services/sync.service.ts b/src/services/sync.service.ts
index 79e726c9aa..f233803c3e 100644
--- a/src/services/sync.service.ts
+++ b/src/services/sync.service.ts
@@ -6,7 +6,7 @@ import { FolderService } from '../abstractions/folder.service';
 import { MessagingService } from '../abstractions/messaging.service';
 import { SettingsService } from '../abstractions/settings.service';
 import { StorageService } from '../abstractions/storage.service';
-import { SyncService as SyncServiceInterface } from '../abstractions/sync.service';
+import { SyncService as SyncServiceAbstraction } from '../abstractions/sync.service';
 import { UserService } from '../abstractions/user.service';
 
 import { CipherData } from '../models/data/cipherData';
@@ -23,7 +23,7 @@ const Keys = {
     lastSyncPrefix: 'lastSync_',
 };
 
-export class SyncService implements SyncServiceInterface {
+export class SyncService implements SyncServiceAbstraction {
     syncInProgress: boolean = false;
 
     constructor(private userService: UserService, private apiService: ApiService,