diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index c2f281574b..60c5225cc0 100755
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -2099,7 +2099,7 @@
                             "type": "float",
                             "unit": "mm/s",
                             "default_value": 20.0,
-                            "value": "speed_topbottom * 20 / 30",
+                            "value": "speed_topmost_skin * 20 / 30",
                             "minimum_value": "0.001",
                             "maximum_value": "math.sqrt(machine_max_feedrate_x ** 2 + machine_max_feedrate_y ** 2)",
                             "maximum_value_warning": "100",
@@ -2458,7 +2458,7 @@
                             "minimum_value_warning": "100",
                             "maximum_value_warning": "10000",
                             "default_value": 3000,
-                            "value": "acceleration_topbottom",
+                            "value": "acceleration_topmost_skin",
                             "enabled": "resolveOrValue('acceleration_enabled') and ironing_enabled",
                             "limit_to_extruder": "top_bottom_extruder_nr",
                             "settable_per_mesh": true
@@ -2759,7 +2759,7 @@
                             "minimum_value": "0.1",
                             "maximum_value_warning": "50",
                             "default_value": 20,
-                            "value": "jerk_topbottom",
+                            "value": "jerk_topmost_skin",
                             "enabled": "resolveOrValue('jerk_enabled') and ironing_enabled",
                             "limit_to_extruder": "top_bottom_extruder_nr",
                             "settable_per_mesh": true