diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index e81d3e7dd6..5dd7bc3a0d 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -3776,8 +3776,8 @@
                     "default_value": 200,
                     "minimum_value_warning": "-1000",
                     "maximum_value_warning": "1000",
-                    "maximum_value": "machine_width - 0.5 * resolveOrValue('prime_tower_size')",
-                    "minimum_value": "0.5 * resolveOrValue('prime_tower_size')",
+                    "maximum_value": "machine_width",
+                    "minimum_value": "resolveOrValue('prime_tower_size')",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false
                 },
@@ -3791,8 +3791,8 @@
                     "default_value": 200,
                     "minimum_value_warning": "-1000",
                     "maximum_value_warning": "1000",
-                    "maximum_value": "machine_depth - 0.5 * resolveOrValue('prime_tower_size')",
-                    "minimum_value": "0.5 * resolveOrValue('prime_tower_size')",
+                    "maximum_value": "machine_depth - resolveOrValue('prime_tower_size')",
+                    "minimum_value": "0",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false
                 },