diff --git a/resources/definitions/creality_sermoond1.def.json b/resources/definitions/creality_sermoond1.def.json
index 207a653b8d..c09019c6f4 100644
--- a/resources/definitions/creality_sermoond1.def.json
+++ b/resources/definitions/creality_sermoond1.def.json
@@ -7,13 +7,6 @@
         "machine_width": { "default_value": 280 },
         "machine_depth": { "default_value": 260 },
         "machine_height": { "default_value": 310 },
-        "machine_head_polygon": { "default_value": [
-                [-26, 34],
-                [-26, -32],
-                [22, -32],
-                [22, 34]
-            ]
-        },
         "machine_head_with_fans_polygon": { "default_value": [
                 [-26, 34],
                 [-26, -32],