diff --git a/core/core-ui.el b/core/core-ui.el
index 078c048c1..b52adae8e 100644
--- a/core/core-ui.el
+++ b/core/core-ui.el
@@ -194,7 +194,8 @@ or if the current buffer is read-only or not file-visiting."
       ;; for tall lines.
       auto-window-vscroll nil
       ;; mouse
-      mouse-wheel-scroll-amount '(2 ((shift) . hscroll)))
+      mouse-wheel-scroll-amount '(2 ((shift) . hscroll))
+      mouse-wheel-scroll-amount-horizontal 2)
 
 ;; Remove hscroll-margin in shells, otherwise it causes jumpiness
 (setq-hook! '(eshell-mode-hook term-mode-hook) hscroll-margin 0)