diff --git a/docs/reference/search/aggregations/bucket/children-aggregation.asciidoc b/docs/reference/search/aggregations/bucket/children-aggregation.asciidoc
index a7ddf4fddda..742bcd334bb 100644
--- a/docs/reference/search/aggregations/bucket/children-aggregation.asciidoc
+++ b/docs/reference/search/aggregations/bucket/children-aggregation.asciidoc
@@ -1,6 +1,8 @@
 [[search-aggregations-bucket-children-aggregation]]
 === Children Aggregation
 
+coming[1.4.0]
+
 A special single bucket aggregation that enables aggregating from buckets on parent document types to buckets on child documents.
 
 This aggregation relies on the <<mapping-parent-field,_parent field>> in the mapping. This aggregation has a single option: