diff --git a/modules/tools/tree-sitter/config.el b/modules/tools/tree-sitter/config.el
index 6a836f9ab..c0a5b4042 100644
--- a/modules/tools/tree-sitter/config.el
+++ b/modules/tools/tree-sitter/config.el
@@ -100,7 +100,7 @@
 
   :config
   ;; HACK: Keep $EMACSDIR clean by installing grammars to the active profile.
-  (add-to-list 'treesit-extra-load-path (concat doom-profile-data-dir "tree-sitter"))
+  (add-to-list 'treesit-extra-load-path (file-name-concat doom-profile-data-dir "tree-sitter"))
   (defadvice! +tree-sitter--install-grammar-to-local-dir-a (fn &rest args)
     "Write grammars to `doom-profile-data-dir'."
     :around #'treesit-install-language-grammar