diff --git a/src/calibre/gui2/bars.py b/src/calibre/gui2/bars.py
index 8b14d37bf4..cb1b039278 100644
--- a/src/calibre/gui2/bars.py
+++ b/src/calibre/gui2/bars.py
@@ -99,7 +99,7 @@ def wrap_button_text(text, max_len=MAX_TEXT_LENGTH):
 
 
 def rewrap_button(w):
-    if not sip.isdeleted(w):
+    if not sip.isdeleted(w) and w.defaultAction() is not None:
         w.setText(wrap_button_text(w.defaultAction().text()))