diff --git a/lisp/progmodes/csharp-mode.el b/lisp/progmodes/csharp-mode.el
index 23d7b05d50b..c507de94e03 100644
--- a/lisp/progmodes/csharp-mode.el
+++ b/lisp/progmodes/csharp-mode.el
@@ -27,6 +27,7 @@
 (require 'compile)
 (require 'cc-mode)
 (require 'cc-langs)
+(require 'treesit)
 
 (eval-when-compile
   (require 'cc-fonts))