diff --git a/src/pe/raytracing/Intersects.h b/src/pe/raytracing/Intersects.h
index 8e5e38cf5802994b55a405f97be64bf7b890c33b..0ba490a0cbef223b7dd3066008faab0abad81772 100644
--- a/src/pe/raytracing/Intersects.h
+++ b/src/pe/raytracing/Intersects.h
@@ -29,7 +29,6 @@
 #include "pe/rigidbody/Union.h"
 #include "pe/utility/BodyCast.h"
 #include <core/math/Utility.h>
-#include <boost/math/special_functions/sign.hpp>
 #include <boost/tuple/tuple.hpp>
 
 #include <pe/raytracing/Ray.h>