diff --git a/Cartesian_kernel/include/CGAL/Cartesian/Circle_3.h b/Cartesian_kernel/include/CGAL/Cartesian/Circle_3.h
index ba583f69e7d..de200ba3e4b 100644
--- a/Cartesian_kernel/include/CGAL/Cartesian/Circle_3.h
+++ b/Cartesian_kernel/include/CGAL/Cartesian/Circle_3.h
@@ -66,10 +66,10 @@ public:
   {
     // the plane contains the center and it is not degenerate
     CGAL_kernel_assertion(!R().is_degenerate_3_object()(p));
-    CGAL_kernel_assertion((p.a() * center.x() +
-                           p.b() * center.y() +
-                           p.c() * center.z() +
-                           p.d()) == 0);
+//    CGAL_kernel_assertion((p.a() * center.x() +
+//                           p.b() * center.y() +
+//                           p.c() * center.z() +
+//                           p.d()) == 0);
     CGAL_kernel_assertion(squared_r >= FT(0));
     base = Rep(Sphere_3(center,squared_r), p);
   }