diff --git a/src/calibre/web/fetch/simple.py b/src/calibre/web/fetch/simple.py
index 8d6301ada4..8dee540e01 100644
--- a/src/calibre/web/fetch/simple.py
+++ b/src/calibre/web/fetch/simple.py
@@ -407,6 +407,7 @@ class RecursiveFetcher(object, LoggingInterface):
                     if not isinstance(_fname, unicode):
                         _fname.decode('latin1', 'replace')
                     _fname = _fname.encode('ascii', 'replace').replace('%', '').replace(os.sep, '')
+                    _fname = sanitize_file_name(_fname)
                     res = os.path.join(linkdiskpath, _fname)
                     self.downloaded_paths.append(res)
                     self.filemap[nurl] = res