diff --git a/doc/src/sgml/syntax.sgml b/doc/src/sgml/syntax.sgml
index 2c9907ab8b..bcdb6f4a0f 100644
--- a/doc/src/sgml/syntax.sgml
+++ b/doc/src/sgml/syntax.sgml
@@ -1045,6 +1045,18 @@ SELECT (5 !) - 6;
unary plus, unary minus
+
+ COLLATE
+ left
+ collation selection
+
+
+
+ AT
+ left
+ AT TIME ZONE
+
+
^
left