diff --git a/src/calibre/gui2/layout.py b/src/calibre/gui2/layout.py
index e18b1c9eda..c72b074463 100644
--- a/src/calibre/gui2/layout.py
+++ b/src/calibre/gui2/layout.py
@@ -317,7 +317,7 @@ class BaseToolBar(QToolBar): # {{{
         QToolBar.resizeEvent(self, ev)
         style = self.get_text_style()
         self.setToolButtonStyle(style)
-        if hasattr(self, 'd_widget'):
+        if hasattr(self, 'd_widget') and hasattr(self.d_widget, 'filler'):
             self.d_widget.filler.setVisible(style != Qt.ToolButtonIconOnly)
 
     def get_text_style(self):