diff --git a/src/common/services/InstantiationService.ts b/src/common/services/InstantiationService.ts
index cf1256c1..375e442d 100644
--- a/src/common/services/InstantiationService.ts
+++ b/src/common/services/InstantiationService.ts
@@ -30,7 +30,7 @@ export class ServiceCollection {
 
   public forEach(callback: (id: IServiceIdentifier<any>, instance: any) => any): void {
     for (const [key, value] of this._entries.entries()) {
-        callback(key, value);
+      callback(key, value);
     }
   }