diff --git a/resources/extruders/deltacomb_extruder_0.def.json b/resources/extruders/deltacomb_extruder_0.def.json
index 35ed340bc0..046becfd82 100755
--- a/resources/extruders/deltacomb_extruder_0.def.json
+++ b/resources/extruders/deltacomb_extruder_0.def.json
@@ -10,6 +10,7 @@
 
     "overrides": {
         "extruder_nr": { "default_value": 0 },
-        "machine_nozzle_size": { "default_value": 0.4 }
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
     }
 }