diff --git a/doc/sql.extensions/README.aggregate_filter.md b/doc/sql.extensions/README.aggregate_filter.md
index 2f33fe3356..a54cf8c776 100644
--- a/doc/sql.extensions/README.aggregate_filter.md
+++ b/doc/sql.extensions/README.aggregate_filter.md
@@ -23,5 +23,5 @@ select count(*) filter (where status = 'A') status_a,
 ## Syntax
 
 ```
-aggregate_function [FILTER (WHERE <condition>) [OVER (<window>)]]
+aggregate_function [FILTER (WHERE <condition>)] [OVER (<window>)]
 ```