diff --git a/modules/ui/popup/+hacks.el b/modules/ui/popup/+hacks.el
index bed4445d4..e71826425 100644
--- a/modules/ui/popup/+hacks.el
+++ b/modules/ui/popup/+hacks.el
@@ -302,7 +302,7 @@ instead of switch-to-buffer-*."
 
 ;; `which-key'
 (after! which-key
-  (when (eq which-key-popup-type 'side)
+  (when (eq which-key-popup-type 'side-window)
     (setq which-key-popup-type 'custom
           which-key-custom-popup-max-dimensions-function (lambda (_) (which-key--side-window-max-dimensions))
           which-key-custom-hide-popup-function #'which-key--hide-buffer-side-window