diff --git a/resources/definitions/ultimaker.def.json b/resources/definitions/ultimaker.def.json
index 8bc294c3d0..9db73fa7f1 100644
--- a/resources/definitions/ultimaker.def.json
+++ b/resources/definitions/ultimaker.def.json
@@ -50,14 +50,8 @@
         "bottom_layers": {
             "value": "math.ceil(round(bottom_thickness / resolveOrValue('layer_height'), 4))"
         },
-        "roofing_layer_count": {
-            "value": 1
-        },
         "skin_material_flow": {
-            "value": "0.95 * material_flow"
-        },
-        "roofing_material_flow": {
-            "value": "material_flow"
+            "value": "0.97 * material_flow"
         },
         "infill_material_flow": {
             "value": "(1.95-infill_sparse_density / 100 if infill_sparse_density > 95 else 1) * material_flow"