--- nufraw-0.42/nufraw_exiv2.cc.orig	2019-05-18 08:41:34.220544309 +0000
+++ nufraw-0.42/nufraw_exiv2.cc	2019-05-18 08:41:41.170631700 +0000
@@ -20,6 +20,7 @@
 #include <exiv2/exif.hpp>
 #include <sstream>
 #include <cassert>
+#include <iostream>
 
 /*
  * Helper function to copy a string to a buffer, converting it from