diff --git a/src/CAD/IFox.CAD.Shared/ExtensionMethod/Curve3dEx.cs b/src/CAD/IFox.CAD.Shared/ExtensionMethod/Curve3dEx.cs
index f415ea30ed249e5b5fbfc813c4fc26dba3492df2..b889bee25db7079afd49d7f5203a94dc3f287223 100644
--- a/src/CAD/IFox.CAD.Shared/ExtensionMethod/Curve3dEx.cs
+++ b/src/CAD/IFox.CAD.Shared/ExtensionMethod/Curve3dEx.cs
@@ -1,4 +1,4 @@
-using System.Runtime.CompilerServices;
+using System.Runtime.CompilerServices;
 
 namespace IFoxCAD.Cad;
 
@@ -522,7 +522,7 @@ public static Spline ToCurve(this NurbCurve3d nc3d)
                     knots,
                     ncdata.Weights,
                     Tolerance.Global.EqualPoint,
-                    ncdata.Knots.Tolerance);
+                    ncdata.Knots.Tolerance) { Type = SplineType.FitPoints };
         }
         return spl;
     }