diff --git a/LuaLibs/BeamExec.lua b/LuaLibs/BeamExec.lua
index f7e53ee..3ecb70e 100644
--- a/LuaLibs/BeamExec.lua
+++ b/LuaLibs/BeamExec.lua
@@ -841,8 +841,8 @@ local function GetHeadTailInfoForNesting( HeadProc, TailProc, Part)
       end
    end
    -- per nesting, si settano come info le normali delle facce di taglio
-   HeadcutInfo.vtN = HeadProc.Faces[1].vtN
-   TailcutInfo.vtN = TailProc.Faces[1].vtN
+   HeadcutInfo.vtN = Vector3d( HeadProc.Faces[1].vtN)
+   TailcutInfo.vtN = Vector3d( TailProc.Faces[1].vtN)
 
    return HeadcutInfo, TailcutInfo
 end