- (setq org-ref-message-timer-mouse
- (run-at-time "0.5 sec" org-ref-mouse-message-interval 'org-ref-mouse-message)))
+ (or org-ref-message-timer-mouse
+ (setq org-ref-message-timer-mouse
+ (run-at-time "0.5 sec"
+ org-ref-mouse-message-interval
+ 'org-ref-mouse-message))))