diff --git a/modules/lang/rust/config.el b/modules/lang/rust/config.el
index dcaa14cd2..42d44d98c 100644
--- a/modules/lang/rust/config.el
+++ b/modules/lang/rust/config.el
@@ -61,7 +61,7 @@
   ;; `auto-mode-alist'. We make extra sure that doesn't stick, especially when a
   ;; buffer is reverted, as it is after rustfmt is done wiht it.
   (after! rust-mode
-    (setq auto-mode-alist (delete '("\\.rs\\'" . rust-mode)) auto-mode-alist))
+    (setq auto-mode-alist (delete '("\\.rs\\'" . rust-mode) auto-mode-alist)))
   :config
   (set-lookup-handlers! 'rustic-mode
     :definition '(racer-find-definition :async t)