diff --git a/lisp/org-agenda.el b/lisp/org-agenda.el
index 2fd33b38e..fb6603764 100644
--- a/lisp/org-agenda.el
+++ b/lisp/org-agenda.el
@@ -2350,6 +2350,7 @@ The following commands are available:
 (org-defkey org-agenda-mode-map "<" 'org-agenda-filter-by-category)
 (org-defkey org-agenda-mode-map "^" 'org-agenda-filter-by-top-headline)
 (org-defkey org-agenda-mode-map ";" 'org-timer-set-timer)
+(org-defkey org-agenda-mode-map "\C-c\C-x_" 'org-timer-stop)
 (define-key org-agenda-mode-map "?" 'org-agenda-show-the-flagging-note)
 (org-defkey org-agenda-mode-map "\C-c\C-x\C-mg"    'org-mobile-pull)
 (org-defkey org-agenda-mode-map "\C-c\C-x\C-mp"    'org-mobile-push)