diff --git a/resources/extruders/rigid3d_base_extruder_0.def.json b/resources/extruders/rigid3d_base_extruder_0.def.json
index fb3a271c13..c4d34c304f 100644
--- a/resources/extruders/rigid3d_base_extruder_0.def.json
+++ b/resources/extruders/rigid3d_base_extruder_0.def.json
@@ -8,7 +8,7 @@
     },
 
     "overrides": {
-        "extruder_nr": { "default_value": "0" },
+        "extruder_nr": { "default_value": 0 },
         "machine_nozzle_size": { "default_value": 0.4 },
         "material_diameter": { "default_value": 1.75 }
     }