diff --git a/contrib/!lang/shell-scripts/config.el b/contrib/!lang/shell-scripts/config.el
new file mode 100644
index 000000000..20e230ac4
--- /dev/null
+++ b/contrib/!lang/shell-scripts/config.el
@@ -0,0 +1,27 @@
+;;; packages.el --- Shell Scripts Layer packages File for Spacemacs
+;;
+;; Copyright (c) 2012-2014 Sylvain Benner
+;; Copyright (c) 2014-2015 Sylvain Benner & Contributors
+;;
+;; Author: James Conroy-Finn <james@logi.cl>
+;;
+;; This file is not part of GNU Emacs.
+;;
+;;; License: GPLv3
+
+;; Use sh-mode when opening `.zsh' files, and when opening Prezto runcoms.
+(dolist (pattern '("\\.zsh\\'"
+                   "zlogin\\'"
+                   "zlogout\\'"
+                   "zpreztorc\\'"
+                   "zprofile\\'"
+                   "zshenv\\'"
+                   "zshrc\\'"))
+  (add-to-list 'auto-mode-alist (cons pattern 'sh-mode)))
+
+;; When we open a `.zsh' file set the shell to ZSH.
+(add-hook
+ 'sh-mode-hook
+ (lambda ()
+   (if (string-match "\\.zsh$" buffer-file-name)
+       (sh-set-shell "zsh"))))