diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 2e638a1231..8ba538b2ea 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -3646,6 +3646,39 @@
                     "settable_per_mesh": false,
                     "settable_per_extruder": false
                 },
+                "prime_tower_min_volume":
+                {
+                    "label": "Prime Tower Minimum Volume",
+                    "description": "The minimum volume each layer of the prime tower in order to purge enough material.",
+                    "unit": "mm³",
+                    "type": "float",
+                    "default_value": 4.544,
+                    "minimum_value": "0",
+                    "maximum_value_warning": "resolveOrValue('prime_tower_size') * resolveOrValue('prime_tower_size') * resolveOrValue('layer_height')",
+                    "enabled": "resolveOrValue('prime_tower_enable')",
+                    "resolve": "max(extruderValues('prime_tower_min_volume'))",
+                    "settable_per_mesh": false,
+                    "settable_per_extruder": false,
+                    "children":
+                    {
+                        "prime_tower_wall_thickness":
+                        {
+                            "label": "Prime Tower Wall Thickness",
+                            "description": "The thickness of the outside walls in the horizontal direction. This value divided by the wall line width defines the number of walls.",
+                            "unit": "mm",
+                            "type": "float",
+                            "default_value": 0.8,
+                            "value": "max(2 * min(extruderValues('prime_tower_line_width')), 0.5 * (resolveOrValue('prime_tower_size') - math.sqrt(resolveOrValue('prime_tower_size') * resolveOrValue('prime_tower_size') - max(extruderValues('prime_tower_min_volume')) / resolveOrValue('layer_height'))))",
+                            "resolve": "max(extruderValues('prime_tower_wall_thickness'))",
+                            "minimum_value": "0.001",
+                            "minimum_value_warning": "2 * min(extruderValues('prime_tower_line_width'))",
+                            "maximum_value_warning": "resolveOrValue('prime_tower_size') / 2",
+                            "enabled": "resolveOrValue('prime_tower_enable')",
+                            "settable_per_mesh": false,
+                            "settable_per_extruder": false
+                        }
+                    }
+                },
                 "prime_tower_position_x":
                 {
                     "label": "Prime Tower X Position",