diff --git a/doc/src/sgml/xfunc.sgml b/doc/src/sgml/xfunc.sgml
index 70dfe380190..2280b2fd6ad 100644
--- a/doc/src/sgml/xfunc.sgml
+++ b/doc/src/sgml/xfunc.sgml
@@ -116,7 +116,7 @@
Besides SELECT queries, the commands can include data
modification queries (INSERT,
UPDATE, and DELETE), as well as
- other SQL commands. (You cannot put transaction commands, e.g.
+ other SQL commands. (You cannot use transaction control commands, e.g.
COMMIT>, SAVEPOINT>, and some utility
commands, e.g. VACUUM>, into an SQL function.)
However, the final command