diff --git a/skeletons/NumericString.c b/skeletons/NumericString.c
index 50fe449..b669f57 100644
--- a/skeletons/NumericString.c
+++ b/skeletons/NumericString.c
@@ -8,7 +8,7 @@
 /*
  * NumericString basic type description.
  */
-static ber_tlv_tag_t asn_DEF_NumericString_tags[] = {
+static const ber_tlv_tag_t asn_DEF_NumericString_tags[] = {
 	(ASN_TAG_CLASS_UNIVERSAL | (18 << 2)),	/* [UNIVERSAL 18] IMPLICIT ...*/
 	(ASN_TAG_CLASS_UNIVERSAL | (4 << 2))	/* ... OCTET STRING */
 };