diff --git a/emacs/.emacs.d/init.el b/emacs/.emacs.d/init.el
index c39c394..f0bbbf5 100644
--- a/emacs/.emacs.d/init.el
+++ b/emacs/.emacs.d/init.el
@@ -68,11 +68,15 @@ This is currently the data directory under the
 ;; directory.
 (setq auto-save-list-file-prefix (oni:data-location "auto-save-list/.saves-"))
 
-;;;; Don't use tabs:
+;;;; Tabs:
 ;; Generally I prefer using spaces over tabs. Especially for lisp-like
 ;; languages.
 (setq-default indent-tabs-mode nil)
 
+;; A tab-width of 8 is too wide for me, and 2 is too narrow. 4 is just
+;; right.
+(setq-default tab-width 4)
+
 ;;;; Font:
 
 (defvar oni:preferred-font "Fantasque Sans Mono-13"