diff --git a/kdc/process.c b/kdc/process.c
index bd786e3ad..b32e3a737 100644
--- a/kdc/process.c
+++ b/kdc/process.c
@@ -55,6 +55,7 @@ krb5_kdc_process_request(krb5_context context,
     KDC_REQ req;
     Ticket ticket;
     DigestREQ digestreq;
+    Kx509Request kx509req;
     krb5_error_code ret;
     size_t i;
 
@@ -81,6 +82,10 @@ krb5_kdc_process_request(krb5_context context,
 	ret = _kdc_do_digest(context, config, &digestreq, reply, from, addr);
 	free_DigestREQ(&digestreq);
 	return ret;
+    } else if (_kdc_try_kx509_request(buf, len, &kx509req, &i) == 0) {
+	ret = _kdc_do_kx509(context, config, &kx509req, reply, from, addr);
+	free_Kx509Request(&kx509req);
+	return ret;
     } else if(_kdc_maybe_version4(buf, len)){
 	*prependlength = FALSE; /* elbitapmoc sdrawkcab XXX */
 	_kdc_do_version4(context, config, buf, len, reply, from,