diff --git a/labelImg.py b/labelImg.py
index efd8a2976..7819a1f1f 100755
--- a/labelImg.py
+++ b/labelImg.py
@@ -1357,7 +1357,11 @@ def open_dir_dialog(self, _value=False, dir_path=None, silent=False):
             target_dir_path = ustr(default_open_dir_path)
         self.last_open_dir = target_dir_path
         self.import_dir_images(target_dir_path)
-        self.default_save_dir = target_dir_path
+        if not self.default_save_dir:
+            self.default_save_dir = target_dir_path
+        file_containing_labels = os.path.join(self.default_save_dir, 'classes.txt')
+        if not self.label_hist:
+            self.load_predefined_classes(file_containing_labels)
         if self.file_path:
             self.show_bounding_box_from_annotation_file(file_path=self.file_path)