diff --git a/src/Lib/Geometry/util.cxx b/src/Lib/Geometry/util.cxx
index 14d8972a..1ad947a7 100644
--- a/src/Lib/Geometry/util.cxx
+++ b/src/Lib/Geometry/util.cxx
@@ -24,7 +24,7 @@ getIntersection (const Point3D &p0, const Point3D &p1,
 		 const Point3D &p2, const Point3D &p3,
 		 Point3D &intersection)
 {
-    const double my_eps = 0.00000000000001;
+    const double my_eps = 1E-12;
     
     double u_num =
         ((p3.x()-p2.x())*(p0.y()-p2.y()))-((p3.y()-p2.y())*(p0.x()-p2.x()));