diff --git a/packages/language-service/override_rename_ts_plugin.ts b/packages/language-service/override_rename_ts_plugin.ts
index 834394c3594..72c658b3293 100644
--- a/packages/language-service/override_rename_ts_plugin.ts
+++ b/packages/language-service/override_rename_ts_plugin.ts
@@ -13,7 +13,7 @@ function isAngularCore(path: string): boolean {
 }
 
 function isExternalAngularCore(path: string): boolean {
-  return path.endsWith('@angular/core/core.d.ts');
+  return path.endsWith('@angular/core/core.d.ts') || path.endsWith('@angular/core/index.d.ts');
 }
 
 function isInternalAngularCore(path: string): boolean {