diff --git a/packages/common/src/directives/ng_for_of.ts b/packages/common/src/directives/ng_for_of.ts
index 32d5955c99..02d8243690 100644
--- a/packages/common/src/directives/ng_for_of.ts
+++ b/packages/common/src/directives/ng_for_of.ts
@@ -85,6 +85,7 @@ export class NgForOfContext<T, U extends NgIterable<T> = NgIterable<T>> {
  * more complex then a property access, for example when using the async pipe (`userStreams |
  * async`).
  * - `index: number`: The index of the current item in the iterable.
+ * - `count: number`: The length of the iterable.
  * - `first: boolean`: True when the item is the first item in the iterable.
  * - `last: boolean`: True when the item is the last item in the iterable.
  * - `even: boolean`: True when the item has an even index in the iterable.