diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 8547aa4df6..364608767c 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -3654,7 +3654,7 @@
                     "type": "float",
                     "default_value": 10,
                     "minimum_value": "0",
-                    "maximum_value_warning": "resolveOrValue('prime_tower_size') * resolveOrValue('prime_tower_size') * resolveOrValue('layer_height')",
+                    "maximum_value_warning": "resolveOrValue('prime_tower_size') ** 2 * resolveOrValue('layer_height')",
                     "enabled": "resolveOrValue('prime_tower_enable')",
                     "settable_per_mesh": false,
                     "settable_per_extruder": true,
@@ -3667,7 +3667,7 @@
                             "unit": "mm",
                             "type": "float",
                             "default_value": 2,
-                            "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'))))",
+                            "value": "max(2 * min(extruderValues('prime_tower_line_width')), 0.5 * (resolveOrValue('prime_tower_size') - math.sqrt(resolveOrValue('prime_tower_size') ** 2 - 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'))",