diff --git a/resources/definitions/ultimaker_s8.def.json b/resources/definitions/ultimaker_s8.def.json
index 60f980db32b..78c10adcf02 100644
--- a/resources/definitions/ultimaker_s8.def.json
+++ b/resources/definitions/ultimaker_s8.def.json
@@ -91,7 +91,7 @@
         "cool_min_speed": { "value": 6 },
         "cool_min_temperature": { "value": "material_print_temperature-15" },
         "default_material_print_temperature": { "maximum_value_warning": 320 },
-        "extra_infill_lines_to_support_skins": { "value": "'walls_and_lines'" },
+        "extra_infill_lines_to_support_skins": { "value": "walls_and_lines" },
         "gradual_flow_enabled": { "value": false },
         "hole_xy_offset": { "value": 0.075 },
         "infill_overlap": { "value": 10 },