diff --git a/lib/hx509/hx509.h b/lib/hx509/hx509.h
index e93df16d6..1a5e2f308 100644
--- a/lib/hx509/hx509.h
+++ b/lib/hx509/hx509.h
@@ -142,6 +142,7 @@ typedef enum {
 /* flags to hx509_cms_envelope_1 */
 #define HX509_CMS_EV_NO_KU_CHECK			0x01
 #define HX509_CMS_EV_ALLOW_WEAK				0x02
+#define HX509_CMS_EV_ID_NAME				0x04
 
 /* flags to hx509_cms_verify_signed */
 #define HX509_CMS_VS_ALLOW_DATA_OID_MISMATCH		0x01