diff --git a/src/DatabaseServices/Contour.ts b/src/DatabaseServices/Contour.ts
index 76524b109..0d3fe8600 100644
--- a/src/DatabaseServices/Contour.ts
+++ b/src/DatabaseServices/Contour.ts
@@ -17,6 +17,9 @@ export class Contour
         let closeCurve = Contour.Combine(cus) as Polyline | Circle;
         if (closeCurve && closeCurve.IsClose)
         {
+            if (closeCurve instanceof Polyline)
+                closeCurve.CloseMark = true;
+
             let c = new Contour();
             c.m_Curve = closeCurve;
             return c;