diff --git a/src/osgUtil/LineSegmentIntersector.cpp b/src/osgUtil/LineSegmentIntersector.cpp
index 937accbff..d1b467370 100644
--- a/src/osgUtil/LineSegmentIntersector.cpp
+++ b/src/osgUtil/LineSegmentIntersector.cpp
@@ -525,7 +525,7 @@ bool LineSegmentIntersector::intersectAndClip(osg::Vec3d& s, osg::Vec3d& e,const
     osg::Vec3d bb_min(bbInput._min);
     osg::Vec3d bb_max(bbInput._max);
 
-    double epsilon = 1e-6;
+    double epsilon = 1e-5;
 
     // compate s and e against the xMin to xMax range of bb.
     if (s.x()<=e.x())