diff --git a/include/sc_grid_searchers.h b/include/sc_grid_searchers.h
index b06a0157..3394e85e 100644
--- a/include/sc_grid_searchers.h
+++ b/include/sc_grid_searchers.h
@@ -31,7 +31,7 @@
 class GameObject;
 class Creature;
 
-struct ObjectDistanceOrder : public std::binary_function<const WorldObject, const WorldObject, bool>
+struct ObjectDistanceOrder : public std::function<bool(const WorldObject, const WorldObject)>
 {
     const Unit* m_pSource;
 
@@ -43,7 +43,7 @@ struct ObjectDistanceOrder : public std::binary_function<const WorldObject, cons
     }
 };
 
-struct ObjectDistanceOrderReversed : public std::binary_function<const WorldObject, const WorldObject, bool>
+struct ObjectDistanceOrderReversed : public std::function<bool(const WorldObject, const WorldObject)>
 {
     const Unit* m_pSource;