diff --git a/oni-core.el b/oni-core.el
index 72c0d83..6c1b1ba 100644
--- a/oni-core.el
+++ b/oni-core.el
@@ -107,7 +107,9 @@
 (winner-mode)
 
 (add-to-list 'display-buffer-alist
-             '("\\`\\*help" display-buffer-in-side-window
+             `(,(rx string-start
+                    "*" (any ?h ?H) "elp")
+               display-buffer-in-side-window
                (side . bottom)
                (slot . 0)
                (window-height . 0.33)))