diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index e4252fbc67..d48581b250 100755
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -1139,7 +1139,7 @@
                     "label": "Print Thin Walls",
                     "description": "Print pieces of the model which are horizontally thinner than the nozzle size.",
                     "type": "bool",
-                    "default_value": "false",
+                    "default_value": false,
                     "limit_to_extruder": "wall_0_extruder_nr",
                     "settable_per_mesh": true
                 },