diff --git a/gramps/gui/plug/report/_bookdialog.py b/gramps/gui/plug/report/_bookdialog.py
index 009a34f16..fb884f14f 100644
--- a/gramps/gui/plug/report/_bookdialog.py
+++ b/gramps/gui/plug/report/_bookdialog.py
@@ -954,7 +954,8 @@ class BookDialog(DocReportDialog):
                 self.make_book()
             except (IOError, OSError) as msg:
                 ErrorDialog(str(msg), parent=self.window)
-        self.close()
+        if response != Gtk.ResponseType.DELETE_EVENT:  # already closed
+            self.close()
 
     def setup_style_frame(self):
         pass