X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbook.h;h=4ce74f471fddddfdef74b710e6de15153ac89d93;hp=ed446636c8a45359489b61c345fe00aeb9b9fec2;hb=49e110c52b19f5c99954d4797b8e991b0b60007c;hpb=c5ec94d0f1b128fc2c691c7231663a345409d5cc

diff --git a/src/book.h b/src/book.h
index ed446636..4ce74f47 100644
--- a/src/book.h
+++ b/src/book.h
@@ -17,7 +17,7 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#if !defined(BOOK_H_INCLUDED)
+#ifndef BOOK_H_INCLUDED
 #define BOOK_H_INCLUDED
 
 #include <fstream>
@@ -42,4 +42,4 @@ private:
   std::string fileName;
 };
 
-#endif // !defined(BOOK_H_INCLUDED)
+#endif // #ifndef BOOK_H_INCLUDED