diff --git a/resources/definitions/ultimaker3.def.json b/resources/definitions/ultimaker3.def.json
index 0a76e07814..f3783ac2e2 100644
--- a/resources/definitions/ultimaker3.def.json
+++ b/resources/definitions/ultimaker3.def.json
@@ -58,13 +58,13 @@
         "gantry_height": { "default_value": 60 },
         "machine_disallowed_areas": { "default_value": [
             [[92.8, -53.4], [92.8, -97.5], [116.5, -97.5], [116.5, -53.4]],
-            [[74.9, 107.5], [74.9, 100.5], [116.5, 100.5], [116.5, 107.5]]
+            [[73.8, 107.5], [73.8, 100.5], [116.5, 100.5], [116.5, 107.5]],
+            [[92.6, 107.5], [92.6, 100.5], [116.5, 100.5], [116.5, 107.5]],
+            [[92.9, -97.5], [92.9, -107.5], [116.5, -107.5], [116.5, -97.5]]
         ]},
         "nozzle_disallowed_areas": { "default_value": [
             [[-116.5, -103.5], [-116.5, -107.5], [-100.9, -107.5], [-100.9, -103.5]],
-            [[-116.5, 105.8], [-96.9, 105.8], [-96.9, 107.5], [-116.5, 107.5]],
-            [[74.6, 107.5], [74.6, 101.4], [116.5, 101.4], [116.5, 107.5]],
-            [[74.9, -97.5], [74.9, -107.5], [116.5, -107.5], [116.5, -97.5]]
+            [[-116.5, 105.8], [-96.9, 105.8], [-96.9, 107.5], [-116.5, 107.5]]
         ]},
         "machine_extruder_count": { "default_value": 2 },
         "extruder_prime_pos_abs": { "default_value": true },