diff --git a/docs/developers/operations-api/logs.md b/docs/developers/operations-api/logs.md
index 4bf6b518..2c2ba194 100644
--- a/docs/developers/operations-api/logs.md
+++ b/docs/developers/operations-api/logs.md
@@ -17,6 +17,7 @@ _Operation is restricted to super_user roles only_
 - `from` _(optional)_ - date to begin showing log results. Must be `YYYY-MM-DD` or `YYYY-MM-DD hh:mm:ss`. Default is first log in `hdb.log`
 - `until` _(optional)_ - date to end showing log results. Must be `YYYY-MM-DD` or `YYYY-MM-DD hh:mm:ss`. Default is last log in `hdb.log`
 - `order` _(optional)_ - order to display logs desc or asc by timestamp. By default, will maintain `hdb.log` order
+- `filter` _(optional)_ - a query string that must be a substring of each log line returned
 
 ### Body