diff --git a/lisp/treesit.el b/lisp/treesit.el
index a1272b97a3a..63d6c213f09 100644
--- a/lisp/treesit.el
+++ b/lisp/treesit.el
@@ -92,6 +92,8 @@
 
 (declare-function treesit-available-p "treesit.c")
 
+(defvar treesit-thing-settings)
+
 ;;; Custom options
 
 ;; Tree-sitter always appear as treesit in symbols.