diff --git a/resources/definitions/printrbot_simple_makers_kit.def.json b/resources/definitions/printrbot_simple_makers_kit.def.json
index 61aecd9240..e2afd57826 100644
--- a/resources/definitions/printrbot_simple_makers_kit.def.json
+++ b/resources/definitions/printrbot_simple_makers_kit.def.json
@@ -6,8 +6,7 @@
         "visible": true,
         "author": "Timur Tabi",
         "manufacturer": "Printrbot",
-        "file_formats": "text/x-gcode",
-        "preferred_material": "*pla*"
+        "file_formats": "text/x-gcode"
     },
 
     "overrides": {