diff --git a/include/osgUtil/IntersectionVisitor b/include/osgUtil/IntersectionVisitor
index 4bfbb9a9f..28450bafe 100644
--- a/include/osgUtil/IntersectionVisitor
+++ b/include/osgUtil/IntersectionVisitor
@@ -53,7 +53,8 @@ class Intersector : public osg::Referenced
         Intersector(CoordinateFrame cf=MODEL):
             _coordinateFrame(cf),
             _intersectionLimit(NO_LIMIT),
-            _disabledCount(0) {}
+            _disabledCount(0),
+            _epsilon(1e-4) {}
 
 
         void setCoordinateFrame(CoordinateFrame cf) { _coordinateFrame = cf; }