diff --git a/skeletons/UTF8String.c b/skeletons/UTF8String.c
index de78c5e..a89a89e 100644
--- a/skeletons/UTF8String.c
+++ b/skeletons/UTF8String.c
@@ -13,9 +13,7 @@
 	(ASN_TAG_CLASS_UNIVERSAL | (12 << 2)),	/* [UNIVERSAL 12] IMPLICIT ...*/
 	(ASN_TAG_CLASS_UNIVERSAL | (4 << 2)),	/* ... OCTET STRING */
 };
-asn_TYPE_descriptor_t asn_DEF_UTF8String = {
-	"UTF8String",
-	"UTF8String",
+asn_TYPE_operation_t asn_OP_UTF8String = {
 	OCTET_STRING_free,
 	UTF8String_print,
 	OCTET_STRING_compare,
@@ -38,7 +36,13 @@
 	OCTET_STRING_decode_uper,
 	OCTET_STRING_encode_uper,
 #endif	/* ASN_DISABLE_PER_SUPPORT */
-	0, /* Use generic outmost tag fetcher */
+	0	/* Use generic outmost tag fetcher */
+};
+asn_TYPE_descriptor_t asn_DEF_UTF8String = {
+	"UTF8String",
+	"UTF8String",
+	&asn_OP_UTF8String,
+	UTF8String_constraint,      /* Check for invalid codes, etc. */
 	asn_DEF_UTF8String_tags,
 	sizeof(asn_DEF_UTF8String_tags)
 	  / sizeof(asn_DEF_UTF8String_tags[0]) - 1,