diff --git a/src/calibre/ebooks/metadata/covers.py b/src/calibre/ebooks/metadata/covers.py
index cbd8fc0e99..3deb54da10 100644
--- a/src/calibre/ebooks/metadata/covers.py
+++ b/src/calibre/ebooks/metadata/covers.py
@@ -145,6 +145,7 @@ class LibraryThingCovers(CoverDownload): # {{{
             return url
 
     def has_cover(self, mi, ans, timeout=5.):
+        return False
         if not mi.isbn or not self.site_customization:
             return False
         from calibre.ebooks.metadata.library_thing import get_browser, login