diff --git a/lib/krb5/krb5.h b/lib/krb5/krb5.h
index 1103ee030..5f4b72a69 100644
--- a/lib/krb5/krb5.h
+++ b/lib/krb5/krb5.h
@@ -444,6 +444,14 @@ krb5_mk_req(krb5_context context,
 	    krb5_ccache ccache,
 	    krb5_data *outbuf);
 
+krb5_error_code
+krb5_mk_req_extended(krb5_context context,
+		     krb5_auth_context *auth_context,
+		     const krb5_flags ap_req_options,
+		     krb5_data *in_data,
+		     krb5_creds *in_creds,
+		     krb5_data *outbuf);
+
 krb5_error_code
 krb5_mk_rep(krb5_context context,
 	    krb5_auth_context *auth_context,