diff --git a/Strategies/Core/SLOTBYCHAINSAW.lua b/Strategies/Core/SLOTBYCHAINSAW.lua
index fad620b..edeac0d 100644
--- a/Strategies/Core/SLOTBYCHAINSAW.lua
+++ b/Strategies/Core/SLOTBYCHAINSAW.lua
@@ -183,6 +183,7 @@ function SLOTBYCHAINSAW.Make( Proc, Part, FaceToMachine, EdgeToMachine, Optional
    else
       Mortising.Steps.nStepType = MCH_MILL_ST.ONEWAY
    end
+   Mortising.Steps.dStep = TOOLS[Mortising.nToolIndex].dStep
    -- faceuse
    if EdgeToMachine.dElevation > - 10 * GEO.EPS_SMALL then
       Mortising.nFaceuse = BeamLib.GetNearestParalOpposite( EdgeToMachine.vtToolDirection)