--- /google/src/files/head/depot/google3/third_party/boost/do_not_include_from_google3_only_third_party/boost/boost/heap/heap_merge.hpp	2015-12-02 09:08:46.000000000 -0800
+++ boost/heap/heap_merge.hpp	2016-10-27 08:34:11.000000000 -0700
@@ -9,6 +9,8 @@
 #ifndef BOOST_HEAP_MERGE_HPP
 #define BOOST_HEAP_MERGE_HPP
 
+#include <algorithm>
+
 #include <boost/concept/assert.hpp>
 #include <boost/heap/heap_concepts.hpp>
 #include <boost/type_traits/is_same.hpp>