diff --git a/openpype/tools/publisher/widgets/widgets.py b/openpype/tools/publisher/widgets/widgets.py
index 23ddeee2de..58a023d5f4 100644
--- a/openpype/tools/publisher/widgets/widgets.py
+++ b/openpype/tools/publisher/widgets/widgets.py
@@ -1570,7 +1570,7 @@ class SubsetAttributesWidget(QtWidgets.QWidget):
 
         self.creator_attrs_widget = creator_attrs_widget
         self.publish_attrs_widget = publish_attrs_widget
-        self.thumbnail_widget = thumbnail_widget
+        self._thumbnail_widget = thumbnail_widget
 
         self.top_bottom = top_bottom
         self.bottom_separator = bottom_separator