diff --git a/skeletons/tests/check-OIDs.c b/skeletons/tests/check-OIDs.c
index 4d4c9b5..b7fafe0 100644
--- a/skeletons/tests/check-OIDs.c
+++ b/skeletons/tests/check-OIDs.c
@@ -442,3 +442,7 @@
 
 	return 0;
 }
+
+asn_dec_rval_t OCTET_STRING_decode_uper(asn_codec_ctx_t *ctx, asn_TYPE_descriptor_t *td, asn_per_constraints_t *cts, void **sptr, asn_per_data_t *pd) { asn_dec_rval_t rv = { 0, 0 }; (void)ctx; (void)td; (void)cts; (void)sptr; (void)pd; return rv; }
+
+asn_enc_rval_t OCTET_STRING_encode_uper(asn_TYPE_descriptor_t *td, asn_per_constraints_t *cts, void *sptr, asn_per_outp_t *po) { asn_enc_rval_t er = { 0, 0, 0 }; (void)td; (void)cts; (void)sptr; (void)po; return er; }
diff --git a/skeletons/tests/check-REAL.c b/skeletons/tests/check-REAL.c
index 641da2d..3a868aa 100644
--- a/skeletons/tests/check-REAL.c
+++ b/skeletons/tests/check-REAL.c
@@ -286,3 +286,7 @@
 
 	return 0;
 }
+
+asn_dec_rval_t OCTET_STRING_decode_uper(asn_codec_ctx_t *ctx, asn_TYPE_descriptor_t *td, asn_per_constraints_t *cts, void **sptr, asn_per_data_t *pd) { asn_dec_rval_t rv = { 0, 0 }; (void)ctx; (void)td; (void)cts; (void)sptr; (void)pd; return rv; }
+
+asn_enc_rval_t OCTET_STRING_encode_uper(asn_TYPE_descriptor_t *td, asn_per_constraints_t *cts, void *sptr, asn_per_outp_t *po) { asn_enc_rval_t er = { 0, 0, 0 }; (void)td; (void)cts; (void)sptr; (void)po; return er; }