diff --git a/doc/src/sgml/ref/create_transform.sgml b/doc/src/sgml/ref/create_transform.sgml
index d321dad7a56..f44ee89d33c 100644
--- a/doc/src/sgml/ref/create_transform.sgml
+++ b/doc/src/sgml/ref/create_transform.sgml
@@ -113,7 +113,7 @@ CREATE [ OR REPLACE ] TRANSFORM FOR type_name LANGUAG
type internal and return type internal. The
actual argument will be of the type for the transform, and the function
should be coded as if it were. (But it is not allowed to declare an
- SQL-level function function returning internal without at
+ SQL-level function returning internal without at
least one argument of type internal.) The actual return
value will be something specific to the language implementation.