diff --git a/modules/home/doom/static/config.el b/modules/home/doom/static/config.el
index dde5c16..d413b46 100644
--- a/modules/home/doom/static/config.el
+++ b/modules/home/doom/static/config.el
@@ -197,7 +197,7 @@
 (after! tree-sitter
   (add-hook! 'c++-ts-mode-hook #'tree-sitter-mode)
   (add-hook! 'tree-sitter-mode-hook #'tree-sitter-hl-mode)
-  (dolist (mapping tree-sitter-major-mode-language-alist)
+  (dolist (mapping (copy-alist tree-sitter-major-mode-language-alist))
     (let* ((pre-mode (car mapping))
            (ts-lang (cdr mapping))
            (post-mode (cdr (assoc pre-mode mode-ts-mode-mapping))))