Allow build on HP-UX 11.X

[stockfish] / src / book.h

diff --git a/src/book.h b/src/book.h
index b68f7bfcadb8ad258c4a8a0da0182e9f8fd479d2..1b7b72c4d90c0f9b326c1657a9db891cc7e1337b 100644 (file)
--- a/src/book.h
+++ b/src/book.h
@@ -60,7 +60,7 @@ public:
   ~Book();
   void open(const std::string& fName);
   void close();
-  const std::string file_name() const;
+  const std::string file_name();
   Move get_move(const Position& pos);
 
 private: