diff --git a/src/db/db/dbEdgesUtils.cc b/src/db/db/dbEdgesUtils.cc
index 220177cd8..4834ef1c4 100644
--- a/src/db/db/dbEdgesUtils.cc
+++ b/src/db/db/dbEdgesUtils.cc
@@ -189,17 +189,22 @@ EdgeSegmentSelector::process (const db::Edge &edge, std::vector<db::Edge> &res)
 {
   double l = std::max (edge.double_length () * m_fraction, double (m_length));
 
+  db::DVector ds;
+  if (! edge.is_degenerate ()) {
+    ds = db::DVector (edge.d ()) * (l / edge.double_length ());
+  }
+
   if (m_mode < 0) {
 
-    res.push_back (db::Edge (edge.p1 (), db::Point (db::DPoint (edge.p1 ()) + db::DVector (edge.d ()) * (l / edge.double_length ()))));
+    res.push_back (db::Edge (edge.p1 (), db::Point (db::DPoint (edge.p1 ()) + ds)));
 
   } else if (m_mode > 0) {
 
-    res.push_back (db::Edge (db::Point (db::DPoint (edge.p2 ()) - db::DVector (edge.d ()) * (l / edge.double_length ())), edge.p2 ()));
+    res.push_back (db::Edge (db::Point (db::DPoint (edge.p2 ()) - ds), edge.p2 ()));
 
   } else {
 
-    db::DVector dl = db::DVector (edge.d ()) * (0.5 * l / edge.double_length ());
+    db::DVector dl = ds * 0.5;
     db::DPoint center = db::DPoint (edge.p1 ()) + db::DVector (edge.p2 () - edge.p1 ()) * 0.5;
 
     res.push_back (db::Edge (db::Point (center - dl), db::Point (center + dl)));