diff --git a/resources/extruders/blocks_rd50_extruder_1.def.json b/resources/extruders/blocks_rd50_extruder_1.def.json
index 69148765aa..0490bc73f7 100644
--- a/resources/extruders/blocks_rd50_extruder_1.def.json
+++ b/resources/extruders/blocks_rd50_extruder_1.def.json
@@ -9,7 +9,7 @@
     },
     "overrides":
     {
-        "extruder_nr": { "default_value": 0 },
+        "extruder_nr": { "default_value": 1 },
         "material_diameter": { "default_value": 1.75 }
     }
 }
\ No newline at end of file