diff --git a/elfeed-prune.el b/elfeed-prune.el
index 8048841..8450968 100644
--- a/elfeed-prune.el
+++ b/elfeed-prune.el
@@ -73,7 +73,7 @@ Each predicate accepts an entry and a feed object and should
 return t when the entry should be pruned, unless any of the
 predicates in `elfeed-prune-keep-predicates' returns t."
   :group 'elfeed-prune
-  :type 'list)
+  :type '(repeat function))
 
 (defcustom elfeed-prune-keep-predicates nil
   "Always keep entries that match one of these predicates.
@@ -81,7 +81,7 @@ predicates in `elfeed-prune-keep-predicates' returns t."
 Each predicate accepts an entry and a feed object and should
 return t when the entry should be kept."
   :group 'elfeed-prune
-  :type 'list)
+  :type '(repeat function))
 
 (defun elfeed-prune--feed-unlisted-p (entry feed)
   (not (seq-contains-p (mapcar #'car elfeed-feeds)