Retire PawnsFileSpan

[stockfish] / src / bitboard.h

diff --git a/src/bitboard.h b/src/bitboard.h
index 9814268327afdd9c269d728077d1f82770035c87..6a1755b662891b26051dad911b1c42bcf2c7de86 100644 (file)
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -21,6 +21,8 @@
 #ifndef BITBOARD_H_INCLUDED
 #define BITBOARD_H_INCLUDED
 
+#include <string>
+
 #include "types.h"
 
 namespace Bitboards {