diff --git a/doc/src/sgml/plpgsql.sgml b/doc/src/sgml/plpgsql.sgml
index b20916353137d9ba577349b42e43170748f80648..75c8acdbd7980dee3566296512d74d8878b1d9a4 100644
--- a/doc/src/sgml/plpgsql.sgml
+++ b/doc/src/sgml/plpgsql.sgml
@@ -1708,7 +1708,7 @@ BEGIN
     RETURN;
 END
 $BODY$
-LANGUAGE 'plpgsql' ;
+LANGUAGE plpgsql;
 
 SELECT * FROM getallfoo();
 </programlisting>