diff --git a/ivy.el b/ivy.el
index eb6cad4e..9bb5cad9 100644
--- a/ivy.el
+++ b/ivy.el
@@ -2465,6 +2465,8 @@ See `completion-in-region' for further information."
                   (string= str (car comps))))
            (message "Sole match"))
           (t
+           (when (eq collection #'crm--collection-fn)
+             (setq comps (delete-dups comps)))
            (let* ((len (ivy-completion-common-length (car comps)))
                   (initial (cond ((= len 0)
                                   "")