diff --git a/skeletons/constr_SET.h b/skeletons/constr_SET.h
index 3adfb33..0c78ed5 100644
--- a/skeletons/constr_SET.h
+++ b/skeletons/constr_SET.h
@@ -52,6 +52,8 @@
 der_type_encoder_f SET_encode_der;
 xer_type_decoder_f SET_decode_xer;
 xer_type_encoder_f SET_encode_xer;
+per_type_decoder_f SET_decode_uper;
+per_type_encoder_f SET_encode_uper;
 
 /***********************
  * Some handy helpers. *