diff --git a/doc/src/sgml/plpgsql.sgml b/doc/src/sgml/plpgsql.sgml
index ba2c57b6871..dcbb44c4ea8 100644
--- a/doc/src/sgml/plpgsql.sgml
+++ b/doc/src/sgml/plpgsql.sgml
@@ -1694,7 +1694,7 @@ BEGIN
     RETURN;
 END
 $BODY$
-LANGUAGE 'plpgsql' ;
+LANGUAGE plpgsql;
 
 SELECT * FROM getallfoo();
 </programlisting>