diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 1a91bbea9c..f652d637ad 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -3161,6 +3161,7 @@
                     "description": "The extruder train to use for printing the skirt/brim/raft. This is used in multi-extrusion.",
                     "type": "extruder",
                     "default_value": "0",
+                    "enabled": "machine_extruder_count > 1",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false
                 },
@@ -3170,7 +3171,7 @@
                     "description": "The extruder train to use for printing the support. This is used in multi-extrusion.",
                     "type": "extruder",
                     "default_value": "0",
-                    "enabled": "support_enable",
+                    "enabled": "support_enable and machine_extruder_count > 1",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "children": {
@@ -3181,7 +3182,7 @@
                             "type": "extruder",
                             "default_value": "0",
                             "value": "support_extruder_nr",
-                            "enabled": "support_enable",
+                            "enabled": "support_enable and machine_extruder_count > 1",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false
                         },
@@ -3192,7 +3193,7 @@
                             "type": "extruder",
                             "default_value": "0",
                             "value": "support_extruder_nr",
-                            "enabled": "support_enable",
+                            "enabled": "support_enable and machine_extruder_count > 1",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false
                         },
@@ -3203,7 +3204,7 @@
                             "type": "extruder",
                             "default_value": "0",
                             "value": "support_extruder_nr",
-                            "enabled": "support_enable and extruderValue(support_extruder_nr, 'support_interface_enable')",
+                            "enabled": "support_enable and machine_extruder_count > 1 and extruderValue(support_extruder_nr, 'support_interface_enable')",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false
                         }