--- src/error-helpers.cc.orig	2018-05-18 08:48:08.000000000 -0700
+++ src/error-helpers.cc	2019-03-09 05:15:43.000000000 -0700
@@ -20,6 +20,7 @@
 #include <octave/oct.h>
 
 #include "error-helpers.h"
+#include <iostream>
 
 // call verror
 #ifdef HAVE_OCTAVE_VERROR_ARG_EXC