diff --git a/FlatCAMApp.py b/FlatCAMApp.py
index f9841030..7fc8f935 100644
--- a/FlatCAMApp.py
+++ b/FlatCAMApp.py
@@ -1858,6 +1858,7 @@ class App(QtCore.QObject):
                                   'endz', 'extracut', 'factor', 'False', 'false', 'feedrate', 'feedrate_rapid',
                                   'filename', 'follow', 'gaps', 'gapsize', 'grid', 'gridoffset', 'gridoffsetx',
                                   'gridoffsety', 'gridx', 'gridy', 'has_offset', 'holes', 'margin', 'method',
+                                  'milled_dias',
                                   'minoffset', 'multidepth', 'name', 'offset', 'opt_type', 'order', 'outname',
                                   'overlap', 'passes', 'postamble', 'ppname_e', 'ppname_g', 'preamble', 'radius', 'ref',
                                   'rest', 'rows', 'scale_factor', 'spacing_columns', 'spacing_rows', 'spindlespeed',
diff --git a/tclCommands/TclCommandMillDrills.py b/tclCommands/TclCommandMillDrills.py
index f82e0da1..6acfb5d6 100644
--- a/tclCommands/TclCommandMillDrills.py
+++ b/tclCommands/TclCommandMillDrills.py
@@ -68,7 +68,7 @@ class TclCommandMillDrills(TclCommandSignaled):
 
         try:
             if 'milled_dias' in args and args['milled_dias'] != 'all':
-                diameters = [x.strip() for x in args['tools'].split(",")]
+                diameters = [x.strip() for x in args['milled_dias'].split(",")]
                 req_tools = []
                 for tool in obj.tools:
                     for req_dia in diameters:
diff --git a/tclCommands/TclCommandMillSlots.py b/tclCommands/TclCommandMillSlots.py
index c4cd651b..ddeec9f7 100644
--- a/tclCommands/TclCommandMillSlots.py
+++ b/tclCommands/TclCommandMillSlots.py
@@ -68,7 +68,7 @@ class TclCommandMillSlots(TclCommandSignaled):
 
         try:
             if 'milled_dias' in args and args['milled_dias'] != 'all':
-                diameters = [x.strip() for x in args['tools'].split(",")]
+                diameters = [x.strip() for x in args['milled_dias'].split(",")]
                 req_tools = []
                 for tool in obj.tools:
                     for req_dia in diameters: