diff --git a/knockout/knockout.d.ts b/knockout/knockout.d.ts
index f0e9fe023f..a7b4cd6411 100644
--- a/knockout/knockout.d.ts
+++ b/knockout/knockout.d.ts
@@ -332,7 +332,7 @@ interface KnockoutUtils {
 }
 
 interface KnockoutArrayChange<T> {
-    status: "added" | "deleted";
+    status: "added" | "deleted" | "retained";
     value: T;
     index: number;
     moved?: number;