diff --git a/src/calibre/gui2/store/web_control.py b/src/calibre/gui2/store/web_control.py
index 17b42c5643..5b4d197503 100644
--- a/src/calibre/gui2/store/web_control.py
+++ b/src/calibre/gui2/store/web_control.py
@@ -15,6 +15,7 @@ from PyQt4.QtWebKit import QWebView, QWebPage
 from calibre import USER_AGENT, get_proxies, get_download_filename
 from calibre.ebooks import BOOK_EXTENSIONS
 from calibre.ptempfile import PersistentTemporaryFile
+from calibre.utils.filenames import ascii_filename
 
 class NPWebView(QWebView):
 
@@ -67,6 +68,7 @@ class NPWebView(QWebView):
 
         filename = get_download_filename(url, cf)
         ext = os.path.splitext(filename)[1][1:].lower()
+        filename = ascii_filename(filename[:60] + '.' + ext)
         if ext not in BOOK_EXTENSIONS:
             if ext == 'acsm':
                 from calibre.gui2.dialogs.confirm_delete import confirm