diff --git a/LuaLibs/ProcessLapJoint.lua b/LuaLibs/ProcessLapJoint.lua
index 3d7ad1d..f9b20a4 100644
--- a/LuaLibs/ProcessLapJoint.lua
+++ b/LuaLibs/ProcessLapJoint.lua
@@ -7486,6 +7486,10 @@ local function MakeMoreFaces( Proc, nPhase, nRawId, nPartId, dOvmHead, bSinglePa
                      if ( bTrySidePocketAtFirst and Proc.Fct == 3 and bIsU) or bForceSideMill then
                         -- lavoro con svuotature (singola o doppia contrapposta)
                         local sMyMchFind = EgtIf( bForceSideMill, 'OpenPocket', 'Pocket')
+                        if Proc.TopologyLongName == 'Groove-Through-RightAngles-Parallel-3'
+                           or Proc.TopologyLongName == 'Rabbet-Through-RightAngles-Parallel-2' then
+                           sMyMchFind = 'OpenPocket'
+                        end
                         local dDiamTool = 100
                         local nPathInt, nSurfInt, bOneShot, nFirstMachId
                         local bIs3Faces = true