diff --git a/src/x509.c b/src/x509.c
index 144731f7d..5cdb53cdb 100644
--- a/src/x509.c
+++ b/src/x509.c
@@ -10500,6 +10500,7 @@ static int ConvertNIDToWolfSSL(int nid)
         case NID_organizationName: return ASN_ORG_NAME;
         case NID_organizationalUnitName: return ASN_ORGUNIT_NAME;
         case NID_emailAddress: return ASN_EMAIL_NAME;
+        case NID_pkcs9_contentType: return ASN_CONTENT_TYPE;
         case NID_serialNumber: return ASN_SERIAL_NUMBER;
         case NID_userId: return ASN_USER_ID;
         case NID_businessCategory: return ASN_BUS_CAT;
diff --git a/wolfssl/wolfcrypt/asn.h b/wolfssl/wolfcrypt/asn.h
index abad111ec..7a63559f0 100644
--- a/wolfssl/wolfcrypt/asn.h
+++ b/wolfssl/wolfcrypt/asn.h
@@ -710,6 +710,8 @@ enum DN_Tags {
     ASN_DNQUALIFIER   = 0x2e,   /* dnQualifier */
 #endif /* WOLFSSL_CERT_NAME_ALL */
 
+    ASN_CONTENT_TYPE  = 0x03,   /* pkcs9_contentType */
+
     ASN_EMAIL_NAME    = 0x98,   /* not actual OID (see attrEmailOid) */
     ASN_CUSTOM_NAME   = 0x99,   /* not actual OID (see CertOidField) */