diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index b843f6c194..b5d3796e74 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -1040,7 +1040,7 @@
                     "default_value": false,
                     "enabled": "retraction_enable",
                     "settable_per_mesh": false,
-                    "settable_per_extruder": true
+                    "settable_per_extruder": true,
                     "children": {
                         "retraction_hop_only_when_collides": {
                             "label": "Z Hop Only Over Printed Parts",