diff --git a/_install-and-configure/configuring-opensearch/index-settings.md b/_install-and-configure/configuring-opensearch/index-settings.md
index f88d060228d..6eb34a85311 100644
--- a/_install-and-configure/configuring-opensearch/index-settings.md
+++ b/_install-and-configure/configuring-opensearch/index-settings.md
@@ -100,6 +100,7 @@ OpenSearch supports the following static index-level index settings:
 
 - `index.merge_on_flush.policy` (default | merge-on-flush): This setting controls which merge policy should be used when `index.merge_on_flush.enabled` is enabled. Default is `default`.
 
+- `index.check_pending_flush.enabled` (Boolean): This setting controls Apache Lucene's Index writer setting checkPendingFlushOnUpdate which controls if an indexing thread should check for pending flushes on update in order to help out flushing indexing buffers to disk
 
 ### Updating a static index setting