diff --git a/src/calibre/gui2/dialogs/message_box.py b/src/calibre/gui2/dialogs/message_box.py
index cfe81b1991..cd1e38682e 100644
--- a/src/calibre/gui2/dialogs/message_box.py
+++ b/src/calibre/gui2/dialogs/message_box.py
@@ -259,6 +259,7 @@ class JobError(QDialog): # {{{
 
     def __init__(self, gui):
         QDialog.__init__(self, gui)
+        self.setAttribute(Qt.WA_DeleteOnClose, False)
         self.gui = gui
         self.queue = []