diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 98909a3325..6d4688bb52 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -3470,7 +3470,8 @@
                     "label": "Support Extruder",
                     "description": "The extruder train to use for printing the support. This is used in multi-extrusion.",
                     "type": "extruder",
-                    "default_value": "-1",
+                    "default_value": "0",
+                    "value": "-1",
                     "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false,
@@ -3480,7 +3481,7 @@
                             "label": "Support Infill Extruder",
                             "description": "The extruder train to use for printing the infill of the support. This is used in multi-extrusion.",
                             "type": "extruder",
-                            "default_value": "-1",
+                            "default_value": "0",
                             "value": "support_extruder_nr",
                             "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                             "settable_per_mesh": false,
@@ -3491,7 +3492,7 @@
                             "label": "First Layer Support Extruder",
                             "description": "The extruder train to use for printing the first layer of support infill. This is used in multi-extrusion.",
                             "type": "extruder",
-                            "default_value": "-1",
+                            "default_value": "0",
                             "value": "support_extruder_nr",
                             "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                             "settable_per_mesh": false,
@@ -3502,7 +3503,7 @@
                             "label": "Support Interface Extruder",
                             "description": "The extruder train to use for printing the roofs and floors of the support. This is used in multi-extrusion.",
                             "type": "extruder",
-                            "default_value": "-1",
+                            "default_value": "0",
                             "value": "support_extruder_nr",
                             "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                             "settable_per_mesh": false,
@@ -3514,7 +3515,7 @@
                                     "label": "Support Roof Extruder",
                                     "description": "The extruder train to use for printing the roofs of the support. This is used in multi-extrusion.",
                                     "type": "extruder",
-                                    "default_value": "-1",
+                                    "default_value": "0",
                                     "value": "support_interface_extruder_nr",
                                     "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                                     "settable_per_mesh": false,
@@ -3525,7 +3526,7 @@
                                     "label": "Support Floor Extruder",
                                     "description": "The extruder train to use for printing the floors of the support. This is used in multi-extrusion.",
                                     "type": "extruder",
-                                    "default_value": "-1",
+                                    "default_value": "0",
                                     "value": "support_interface_extruder_nr",
                                     "enabled": "(support_enable or support_tree_enable) and extruders_enabled_count > 1",
                                     "settable_per_mesh": false,
@@ -4196,7 +4197,8 @@
                     "label": "Build Plate Adhesion Extruder",
                     "description": "The extruder train to use for printing the skirt/brim/raft. This is used in multi-extrusion.",
                     "type": "extruder",
-                    "default_value": "-1",
+                    "default_value": "0",
+                    "value": "-1",
                     "enabled": "extruders_enabled_count > 1 and resolveOrValue('adhesion_type') != 'none'",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false