diff --git a/resources/definitions/eazao_zero.def.json b/resources/definitions/eazao_zero.def.json
index 8311a24a1c..877fd13d92 100644
--- a/resources/definitions/eazao_zero.def.json
+++ b/resources/definitions/eazao_zero.def.json
@@ -83,7 +83,7 @@
         "line_width": {"value":3.0},
         
         "wall_thickness": {"value":3.0},
-        "optimize_wall_printing_order": { "value": True },
+        "optimize_wall_printing_order": { "value": "True" },
         "travel_compensate_overlapping_walls_enabled": { "value": false},
         
         "top_bottom_thickness": {"value":0},