diff --git a/src/slic3r/GUI/GUI_ObjectList.cpp b/src/slic3r/GUI/GUI_ObjectList.cpp
index 2c9138733..77f42eda3 100644
--- a/src/slic3r/GUI/GUI_ObjectList.cpp
+++ b/src/slic3r/GUI/GUI_ObjectList.cpp
@@ -5722,11 +5722,22 @@ void ObjectList::set_extruder_for_selected_items(const int extruder)
         if (type & itLayerRoot)
             continue;
 
+        // BBS: handle extruder 0 for part, use it's parent extruder
+        int new_extruder = extruder;
+        if (extruder == 0) {
+            if (type & itObject) {
+                new_extruder = 1;
+            }
+            else if ((type & itVolume) && (m_objects_model->GetVolumeType(sel_item) == ModelVolumeType::MODEL_PART)) {
+                new_extruder = m_objects_model->GetExtruderNumber(m_objects_model->GetParent(sel_item));
+            }
+        }
+
         ModelConfig& config = get_item_config(item);
         if (config.has("extruder"))
-            config.set("extruder", extruder);
+            config.set("extruder", new_extruder);
         else
-            config.set_key_value("extruder", new ConfigOptionInt(extruder));
+            config.set_key_value("extruder", new ConfigOptionInt(new_extruder));
 
         // for object, clear all its part volume's extruder config
         if (type & itObject) {
@@ -5737,7 +5748,7 @@ void ObjectList::set_extruder_for_selected_items(const int extruder)
             }
         }
 
-        const wxString extruder_str = wxString::Format("%d", extruder);
+        const wxString extruder_str = wxString::Format("%d", new_extruder);
         m_objects_model->SetExtruder(extruder_str, item);
     }