diff --git a/src/lib/webworker.generated.d.ts b/src/lib/webworker.generated.d.ts
index 4e24c70de86..75f316f3d00 100644
--- a/src/lib/webworker.generated.d.ts
+++ b/src/lib/webworker.generated.d.ts
@@ -3,6 +3,11 @@
 /// IE Worker APIs
 /////////////////////////////
 
+interface EventInit {
+    bubbles?: boolean;
+    cancelable?: boolean;
+}
+
 interface EventListener {
     (evt: Event): void;
 }