diff --git a/modules/prelude-helm-everywhere.el b/modules/prelude-helm-everywhere.el
index 0ae3db9..d3cf742 100644
--- a/modules/prelude-helm-everywhere.el
+++ b/modules/prelude-helm-everywhere.el
@@ -50,6 +50,8 @@
 
 (define-key minibuffer-local-map (kbd "C-c C-l") 'helm-minibuffer-history)
 
+(define-key isearch-mode-map (kbd "C-o") 'helm-occur-from-isearch)
+
 ;; shell history.
 (define-key shell-mode-map (kbd "C-c C-l") 'helm-comint-input-ring)