X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fevaluate.h;h=ccc6d5fa7b4b867e15786b328367fd99932bbfe9;hp=95a1f19b750ada6eca975a7f2de77e999392688e;hb=12e79be91039796299187ba1b2f1559552642ea4;hpb=612d93234bdfbac77bba9c7a5756a92b76181ddf

diff --git a/src/evaluate.h b/src/evaluate.h
index 95a1f19b..ccc6d5fa 100644
--- a/src/evaluate.h
+++ b/src/evaluate.h
@@ -2,7 +2,7 @@
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
-  Copyright (C) 2015-2017 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+  Copyright (C) 2015-2018 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -21,6 +21,7 @@
 #ifndef EVALUATE_H_INCLUDED
 #define EVALUATE_H_INCLUDED
 
+#include <atomic>
 #include <string>
 
 #include "types.h"
@@ -29,7 +30,7 @@ class Position;
 
 namespace Eval {
 
-const Value Tempo = Value(20); // Must be visible to search
+constexpr Value Tempo = Value(20); // Must be visible to search
 
 std::string trace(const Position& pos);