diff --git a/resources/definitions/ultimaker.def.json b/resources/definitions/ultimaker.def.json
index 387ea39985..961e1f6619 100644
--- a/resources/definitions/ultimaker.def.json
+++ b/resources/definitions/ultimaker.def.json
@@ -31,7 +31,7 @@
         "bridge_wall_coast": { "value": 0 },
         "bridge_wall_material_flow": { "value": "wall_material_flow" },
         "bridge_wall_speed": { "value": "bridge_skin_speed" },
-        "cool_fan_speed_0": { "value": "cool_fan_speed" },
+        "cool_fan_speed_0": { "value": "cool_fan_speed_min" },
         "gradual_support_infill_steps": { "value": "2 if support_interface_enable else 0" },
         "gradual_support_infill_step_height": { "value": "4 * layer_height" },
         "infill_material_flow": { "value": "(1.95-infill_sparse_density / 100 if infill_sparse_density > 95 else 1) * material_flow" },