diff --git a/init.el b/init.el
index 29634eb..143bea0 100644
--- a/init.el
+++ b/init.el
@@ -1,5 +1,5 @@
 ;;; init.el --- tastytea's Emacs init file.
-;; Time-stamp: <2019-07-19T02:29:31+00:00>
+;; Time-stamp: <2019-07-21T01:30:35+00:00>
 
 ;;; Commentary:
 ;; I am using this file with Emacs 26, but most of it will probably work with
@@ -320,13 +320,15 @@ With argument, do this that many times."
   :hook
   (prog-mode . hs-minor-mode))
 
-;; ;; Highlight indentation levels.
-;; (use-package highlight-indent-guides
-;;   :custom
-;;   (highlight-indent-guides-method 'character)
-;;   ;; (highlight-indent-guides-responsive 'top)
-;;   :hook
-;;   (prog-mode . highlight-indent-guides-mode))
+(use-package hl-indent
+  :custom-face
+  (hl-indent-face ((t (:inherit hl-indent-face ; Reversed whitespace.
+                                :background "gray18"
+                                :foreground "#1c1e1f"
+                                ))))
+  :hook
+  (prog-mode . hl-indent-mode)
+  )
 
 ;; Tries to find points of interest and jumps to them.
 (use-package imenu-anywhere
@@ -361,6 +363,7 @@ With argument, do this that many times."
 (unless slow-computer
   ;; irony communicates with a clang-server. It needs compile_commands.json.
   (use-package irony
+    :pin melpa                          ; 1.3.1 Server does not compile.
     :after yasnippet
     :hook
     (c++-mode        . irony-mode)