diff --git a/init.el b/init.el
index d0e3531..a254501 100644
--- a/init.el
+++ b/init.el
@@ -293,7 +293,7 @@ With argument, do this that many times."
 (setq-default indent-tabs-mode nil
               tab-width 4)
 
-;; Guess indentation.
+;; Guess indentation (c-basic-offset).
 (use-package dtrt-indent
   :hook
   (prog-mode . dtrt-indent-mode))