diff --git a/src/Reactor/RoomHoleReactor.ts b/src/Reactor/RoomHoleReactor.ts
index 91fdca0d7..54ca95479 100644
--- a/src/Reactor/RoomHoleReactor.ts
+++ b/src/Reactor/RoomHoleReactor.ts
@@ -1,8 +1,10 @@
 import { MathUtils } from "three";
+import { Arc } from "../api";
 import { arrayLast } from "../Common/ArrayExt";
 import { CADObject } from "../DatabaseServices/CADObject";
 import { Curve } from "../DatabaseServices/Entity/Curve";
 import { RoomHolePolyline } from "../DatabaseServices/Room/Entity/Wall/Hole/RoomHolePolyline";
+import { RoomWallArc } from "../DatabaseServices/Room/Entity/Wall/RoomWallArc";
 import { RoomWallBase } from "../DatabaseServices/Room/Entity/Wall/RoomWallBase";
 import { CreateGetCurveParam } from "../DatabaseServices/Room/ParseService/GetCurveParam";
 import { FindBestRange, ParseWallRange } from "../DatabaseServices/Room/ParseService/Hole/RoomWallPlaceIHoleHelper";
@@ -152,6 +154,9 @@ export function UpdateHoleFakerWallsAndUpdateDraw(hole: RoomHolePolyline)
             {
                 wall.StartPoint = p1;
                 wall.EndPoint = p2;
+
+                if (wall instanceof RoomWallArc && p1Param > p2Param)
+                    (wall as unknown as Arc).IsClockWise = !wall.IsClockWise;
             }
             else
             {
@@ -169,6 +174,9 @@ export function UpdateHoleFakerWallsAndUpdateDraw(hole: RoomHolePolyline)
 
                 wall.StartPoint = paramGet.GetPointAtParam(p1Param);
                 wall.EndPoint = paramGet.GetPointAtParam(p2Param);
+
+                if (wall instanceof RoomWallArc && p1Param > p2Param)
+                    (wall as unknown as Arc).IsClockWise = !wall.IsClockWise;
             }
         }
         else
@@ -206,6 +214,9 @@ export function UpdateHoleFakerWallsAndUpdateDraw(hole: RoomHolePolyline)
 
             wall.StartPoint = paramGet.GetPointAtParam(p1Param);
             wall.EndPoint = paramGet.GetPointAtParam(p2Param);
+
+            if (wall instanceof RoomWallArc && p1Param > p2Param)
+                (wall as unknown as Arc).IsClockWise = !wall.IsClockWise;
         }
 
         new RoomWallParse(false, undefined, false).Parse(fakerWalls);