diff --git a/bibtex-completion.el b/bibtex-completion.el
index 843d34f..daf3663 100644
--- a/bibtex-completion.el
+++ b/bibtex-completion.el
@@ -62,6 +62,7 @@
 (defvar bibtex-completion-map
   "Keymap for bibtex-completion commands"
   (let ((map (make-sparse-keymap)))
+    (define-key map (kbd "o") '("Open PDF, URL, or DOI" . bibtex-completion-open-any))
     (define-key map (kbd "p") '("Open PDF" . bibtex-completion-open-pdf))
     (define-key map (kbd "u") '("Open URL or DOI" . bibtex-completion-open-url-or-doi))
     (define-key map (kbd "c") '("Insert citation" . bibtex-completion-insert-citation))
@@ -992,6 +993,7 @@ called in case no PDF is found."
 If multiple PDFs are found for an entry, ask for the one to open
 using `completion-read'.  If no PDF is found, try to open a URL
 or DOI in the browser instead."
+  (interactive (list (bibtex-completion--read)))
   (bibtex-completion-open-pdf keys 'bibtex-completion-open-url-or-doi))
 
 (defun bibtex-completion-format-citation-default (keys)