diff --git a/include/mbedtls/oid.h b/include/mbedtls/oid.h
index 55f72c8..c516b7a 100644
--- a/include/mbedtls/oid.h
+++ b/include/mbedtls/oid.h
@@ -214,6 +214,9 @@
  */
 #define MBEDTLS_OID_WISUN_FAN                  MBEDTLS_OID_INTERNET "\x04\x01\x82\xe4\x25\x01"
 
+#define MBEDTLS_OID_ON                          MBEDTLS_OID_PKIX "\x08" /**< id-on OBJECT IDENTIFIER ::= { id-pkix 8 } */
+#define MBEDTLS_OID_ON_HW_MODULE_NAME           MBEDTLS_OID_ON "\x04" /**< id-on-hardwareModuleName OBJECT IDENTIFIER ::= { id-on 4 } */
+
 /*
  * PKCS definition OIDs
  */