diff --git a/src/calibre/gui2/store/search/search.py b/src/calibre/gui2/store/search/search.py
index f6fa423e23..9e78f75b4a 100644
--- a/src/calibre/gui2/store/search/search.py
+++ b/src/calibre/gui2/store/search/search.py
@@ -22,6 +22,7 @@ from calibre.gui2.store.search.adv_search_builder import AdvSearchBuilderDialog
 from calibre.gui2.store.search.download_thread import SearchThreadPool, \
     CacheUpdateThreadPool
 from calibre.gui2.store.search.search_ui import Ui_Dialog
+from calibre.utils.filenames import ascii_filename
 
 class SearchDialog(QDialog, Ui_Dialog):
 
@@ -350,6 +351,7 @@ class SearchDialog(QDialog, Ui_Dialog):
         if d.exec_() == d.Accepted:
             ext = d.format()
             fname = result.title + '.' + ext.lower()
+            fname = ascii_filename(fname)
             self.gui.download_ebook(result.downloads[ext], filename=fname)
     
     def open_store(self, result):