diff --git a/alerting/src/main/kotlin/org/opensearch/alerting/AlertingPlugin.kt b/alerting/src/main/kotlin/org/opensearch/alerting/AlertingPlugin.kt
index 489a846f9..4f8e473d9 100644
--- a/alerting/src/main/kotlin/org/opensearch/alerting/AlertingPlugin.kt
+++ b/alerting/src/main/kotlin/org/opensearch/alerting/AlertingPlugin.kt
@@ -317,6 +317,7 @@ internal class AlertingPlugin : PainlessExtension, ActionPlugin, ScriptPlugin, R
             AlertingSettings.ALERT_HISTORY_RETENTION_PERIOD,
             AlertingSettings.ALERTING_MAX_MONITORS,
             AlertingSettings.PERCOLATE_QUERY_DOCS_SIZE_MEMORY_PERCENTAGE_LIMIT,
+            AlertingSettings.PERCOLATE_QUERY_MAX_NUM_DOCS_IN_MEMORY,
             AlertingSettings.REQUEST_TIMEOUT,
             AlertingSettings.MAX_ACTION_THROTTLE_VALUE,
             AlertingSettings.FILTER_BY_BACKEND_ROLES,