diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 615462195b4..b21c433565c 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1293,6 +1293,25 @@
Tom
+
+
+
+ trim
+
+ trim(leading | trailing
+ | both from
+ string
+ , characters
+ )
+
+ text
+
+ Non-standard version of trim()
+
+ trim(both from 'xTomxx', 'x')
+ Tom
+
+