Move to_char() and to_string() to notation

[stockfish] / src / bitboard.h

diff --git a/src/bitboard.h b/src/bitboard.h
index 9814268327afdd9c269d728077d1f82770035c87..7330a199e1fba11a416da7a37fe379f543eaa9de 100644 (file)
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -21,6 +21,7 @@
 #ifndef BITBOARD_H_INCLUDED
 #define BITBOARD_H_INCLUDED
 
+#include <string>
 #include "types.h"
 
 namespace Bitboards {