diff --git a/BuildingCoder/BuildingCoder/Util.cs b/BuildingCoder/BuildingCoder/Util.cs
index ca3675c..98530c1 100644
--- a/BuildingCoder/BuildingCoder/Util.cs
+++ b/BuildingCoder/BuildingCoder/Util.cs
@@ -859,7 +859,7 @@ public static CurveLoop CreateCurveLoop(
           pts[ i - 1 ], pts[ i ] ) );
       }
       curveLoop.Append( Line.CreateBound(
-        pts[ n ], pts[ 0 ] ) );
+        pts[ n - 1 ], pts[ 0 ] ) );
       return curveLoop;
     }