diff --git a/include/openssl/bytestring.h b/include/openssl/bytestring.h
index 6e184994..1af20e89 100644
--- a/include/openssl/bytestring.h
+++ b/include/openssl/bytestring.h
@@ -122,6 +122,7 @@ OPENSSL_EXPORT int CBS_get_u24_length_prefixed(CBS *cbs, CBS *out);
 #define CBS_ASN1_BITSTRING 0x3
 #define CBS_ASN1_OCTETSTRING 0x4
 #define CBS_ASN1_OBJECT 0x6
+#define CBS_ASN1_ENUMERATED 0xa
 #define CBS_ASN1_SEQUENCE (0x10 | CBS_ASN1_CONSTRUCTED)
 #define CBS_ASN1_SET (0x11 | CBS_ASN1_CONSTRUCTED)