diff --git a/skeletons/IA5String.c b/skeletons/IA5String.c
index a4d7ff8..abc9ff3 100644
--- a/skeletons/IA5String.c
+++ b/skeletons/IA5String.c
@@ -37,7 +37,7 @@
 
 int
 IA5String_constraint(asn_TYPE_descriptor_t *td, const void *sptr,
-		asn_app_consume_bytes_f *app_errlog, void *app_key) {
+		asn_app_constraint_failed_f *ctfailcb, void *app_key) {
 	const IA5String_t *st = (const IA5String_t *)sptr;
 
 	if(st && st->buf) {
@@ -49,7 +49,7 @@
 		 */
 		for(; buf < end; buf++) {
 			if(*buf > 0x7F) {
-				_ASN_ERRLOG(app_errlog, app_key,
+				_ASN_CTFAIL(app_key, td,
 					"%s: value byte %ld out of range: "
 					"%d > 127 (%s:%d)",
 					td->name,
@@ -60,7 +60,7 @@
 			}
 		}
 	} else {
-		_ASN_ERRLOG(app_errlog, app_key,
+		_ASN_CTFAIL(app_key, td,
 			"%s: value not given (%s:%d)",
 			td->name, __FILE__, __LINE__);
 		return -1;