diff --git a/packages/upgrade/src/common/src/downgrade_component.ts b/packages/upgrade/src/common/src/downgrade_component.ts
index b0949e3d85..f48e7c0cc4 100644
--- a/packages/upgrade/src/common/src/downgrade_component.ts
+++ b/packages/upgrade/src/common/src/downgrade_component.ts
@@ -232,7 +232,7 @@ class ParentInjectorPromise extends SyncPromise<Injector> {
     element.data!(this.injectorKey, this);
   }
 
-  resolve(injector: Injector): void {
+  override resolve(injector: Injector): void {
     // Store the real injector on the element.
     this.element.data!(this.injectorKey, injector);