*** gen_leakproof.sql	2015-12-11 14:36:09.000000000 -0800
--- gen_protransform.sql	2015-12-11 14:36:25.000000000 -0800
***************
*** 72,77 ****
      AND prorettype != 'anyenum'::regtype   /* Enum is special */
      AND 'anyenum'::regtype not in (SELECT unnest(proargtypes))
      AND not proiswindow                    /* Window Functions */
  order by p.prolang, p.oid
  ;
- 
--- 72,78 ----
      AND prorettype != 'anyenum'::regtype   /* Enum is special */
      AND 'anyenum'::regtype not in (SELECT unnest(proargtypes))
      AND not proiswindow                    /* Window Functions */
+     AND protransform = 0                   /* Transforms */
+     AND p.oid not in (SELECT protransform from pg_proc)
  order by p.prolang, p.oid
  ;