diff --git a/xs/src/libslic3r/Point.hpp b/xs/src/libslic3r/Point.hpp
index f9850c7..9a52f3f 100644
--- a/xs/src/libslic3r/Point.hpp
+++ b/xs/src/libslic3r/Point.hpp
@@ -128,16 +128,6 @@ class Pointf3 : public Pointf
 namespace boost { namespace polygon {
     template <>
     struct geometry_concept<coord_t> { typedef coordinate_concept type; };
-    
-    template <>
-    struct coordinate_traits<coord_t> {
-        typedef coord_t coordinate_type;
-        typedef long double area_type;
-        typedef long long manhattan_area_type;
-        typedef unsigned long long unsigned_area_type;
-        typedef long long coordinate_difference;
-        typedef long double coordinate_distance;
-    };
 
     template <>
     struct geometry_concept<Point> { typedef point_concept type; };