diff --git a/.emacs.d/init.el b/.emacs.d/init.el
index 4f109f6..4921dee 100644
--- a/.emacs.d/init.el
+++ b/.emacs.d/init.el
@@ -184,6 +184,7 @@
 (add-hook 'erc-mode-hook 'oni:erc-mode-func)
 (add-hook 'go-mode-hook 'oni:go-mode-func)
 (add-hook 'gtags-mode-hook 'oni:gtags-mode-func)
+(add-hook 'haskell-mode-hook 'oni:haskell-mode-func)
 (add-hook 'html-mode-hook 'oni:html-mode-func)
 (add-hook 'jabber-alert-message-hooks 'oni:jabber-alert-message-func)
 (add-hook 'jabber-chat-mode-hook 'oni:jabber-chat-mode-func)
diff --git a/.emacs.d/site-lisp/oni.el b/.emacs.d/site-lisp/oni.el
index 09a9d79..a2dbea0 100644
--- a/.emacs.d/site-lisp/oni.el
+++ b/.emacs.d/site-lisp/oni.el
@@ -120,6 +120,10 @@ DOT are intentionally being skipped."
   (local-set-key "\M-," 'gtags-find-tag)
   (local-set-key "\M-." 'gtags-find-rtag))
 
+(defun oni:haskell-mode-func ()
+  "Function for `haskell-mode-hook'."
+  (turn-on-haskell-indentation))
+
 (defun oni:html-mode-func ()
   "Function for `html-mode-hook'."
   (yas-minor-mode)