diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index ec6d27cc6..305871acd 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -4353,7 +4353,14 @@ fs::path Plater::priv::get_export_file_path(GUI::FileType file_type)
     if (file_type == FT_3MF)
         // for 3mf take the path from the project filename, if any
         output_file = into_path(get_project_filename(".3mf"));
-
+    else if (file_type == FT_STL) {
+        if (obj_idx > 0 && obj_idx < this->model.objects.size() && selection.is_single_full_object()) { 
+            output_file = this->model.objects[obj_idx]->get_export_filename();
+        }
+        else {
+            output_file = into_path(get_project_name());
+        }
+    }
     //bbs  name the project using the part name
     if (output_file.empty()) {
         if (get_project_name() != _L("Untitled")) {