diff --git a/custom.el b/custom.el
index 75c29b9..57f031f 100644
--- a/custom.el
+++ b/custom.el
@@ -11,7 +11,6 @@
  '(backup-directory-alist (quote ((".*" . "~/.emacs.d/backup/"))))
  '(beacon-blink-duration 0.15)
  '(beacon-color "#969696")
- '(bibretrieve-backends (quote (("msn" . 9) ("mrl" . 8) ("arxiv" . 5))))
  '(bsn-backends (quote (msn)))
  '(case-fold-search t)
  '(compilation-auto-jump-to-first-error t)