diff --git a/core/lib/defuns-term.el b/core/lib/defuns-term.el
index ba7e56af3..3eab759e6 100644
--- a/core/lib/defuns-term.el
+++ b/core/lib/defuns-term.el
@@ -41,6 +41,11 @@
   (interactive)
   (tmux (concat "tmux split-window" (if vertical " -h"))))
 
+;;;###autoload
+(defun narf/tmux-vsplit-window ()
+  (interactive)
+  (narf/tmux-split-window t))
+
 ;;;###autoload
 (defun narf/tmux-cd-to-here (&optional dir)
   (interactive)