$OpenBSD$
Index: test/TestMantiuk06Pyramid.cpp
--- test/TestMantiuk06Pyramid.cpp.orig
+++ test/TestMantiuk06Pyramid.cpp
@@ -21,7 +21,7 @@
 
 #include <gtest/gtest.h>
 #include <algorithm>
-#include <tuple>
+#include <boost/tuple/tuple.hpp>
 
 #include "TonemappingOperators/mantiuk06/pyramid.h"
 #include "mantiuk06/contrast_domain.h"
