X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fposition.h;h=69bf40b18a5092231821e0af840c6afaee243a1c;hp=989282772a1cf765e354eca643166fa74ab8d809;hb=ec83e8a72c702713d550fb2a228f56a6c03704c4;hpb=e7289465b9ecb2ab93b240285f8ab677eea86aeb

diff --git a/src/position.h b/src/position.h
index 98928277..69bf40b1 100644
--- a/src/position.h
+++ b/src/position.h
@@ -190,7 +190,7 @@ private:
   bool chess960;
 };
 
-extern std::ostream& operator<<(std::ostream& os, Position& pos);
+extern std::ostream& operator<<(std::ostream& os, const Position& pos);
 
 inline Color Position::side_to_move() const {
   return sideToMove;