diff --git a/src/service-override/views.ts b/src/service-override/views.ts
index 98f47ec7..77c95f72 100644
--- a/src/service-override/views.ts
+++ b/src/service-override/views.ts
@@ -739,5 +739,9 @@ export {
   SidebarPart,
   ActivitybarPart,
   PanelPart,
-  Parts
+  Parts,
+
+  IActivityService,
+  IViewDescriptorService,
+  IPaneCompositePartService
 }