diff --git a/TriangleNet_Engine/Compute/VoronoiRegions.cs b/TriangleNet_Engine/Compute/VoronoiRegions.cs
index bfdf1a7..46851ef 100644
--- a/TriangleNet_Engine/Compute/VoronoiRegions.cs
+++ b/TriangleNet_Engine/Compute/VoronoiRegions.cs
@@ -454,9 +454,9 @@ private static bool AnyIntersectingNotEndPoints(this List<ICurve> curves, List<P
                             else
                                 mustIncludePts[i].Add(point);
 
-                            if (point.SquareDistance(stPt) < sqTol)
+                            if (point.SquareDistance(c2.IStartPoint()) < sqTol)
                                 offsetStart[j] = endPt = true;
-                            else if (point.SquareDistance(enPt) < sqTol)
+                            else if (point.SquareDistance(c2.IEndPoint()) < sqTol)
                                 offsetEnd[j] = endPt = true;
                             else
                                 mustIncludePts[j].Add(point);