diff --git a/README.md b/README.md
index a3223a9..c6d9785 100644
--- a/README.md
+++ b/README.md
@@ -1,35 +1,35 @@
-- [About](#about)
-- [Configurations](#configurations)
-  - [Meta](#meta)
-  - [Package](#package)
-  - [Mac OS X](#mac-os-x)
-  - [Require](#require)
-  - [Sane defaults](#sane-defaults)
-  - [Modes](#modes)
-  - [Visual](#visual)
-  - [Ido](#ido)
-  - [Calendar](#calendar)
-  - [Mail](#mail)
-  - [Flyspell](#flyspell)
-  - [Org](#org)
-  - [Interactive functions](#interactive-functions)
-  - [Advice](#advice)
-  - [Presentation-mode](#presentation-mode)
-- [Mode specific](#mode-specific)
-  - [Shell](#shell)
-  - [Lisp](#lisp)
-    - [Emacs Lisp](#emacs-lisp)
-    - [Common lisp](#common-lisp)
-    - [Scheme](#scheme)
-  - [Java and C](#java-and-c)
-  - [Assembler](#assembler)
-  - [LaTeX](#latex)
-  - [Markdown](#markdown)
-  - [Python](#python)
-  - [Haskell](#haskell)
-  - [Matlab](#matlab)
-- [Key bindings](#key-bindings)
-- [License](#license)
+- [About](#sec-1)
+- [Configurations](#sec-2)
+  - [Meta](#sec-2-1)
+  - [Package](#sec-2-2)
+  - [Mac OS X](#sec-2-3)
+  - [Require](#sec-2-4)
+  - [Sane defaults](#sec-2-5)
+  - [Modes](#sec-2-6)
+  - [Visual](#sec-2-7)
+  - [Ido](#sec-2-8)
+  - [Calendar](#sec-2-9)
+  - [Mail](#sec-2-10)
+  - [Flyspell](#sec-2-11)
+  - [Org](#sec-2-12)
+  - [Interactive functions](#sec-2-13)
+  - [Advice](#sec-2-14)
+  - [Presentation-mode](#sec-2-15)
+- [Mode specific](#sec-3)
+  - [Shell](#sec-3-1)
+  - [Lisp](#sec-3-2)
+    - [Emacs Lisp](#sec-3-2-1)
+    - [Common lisp](#sec-3-2-2)
+    - [Scheme](#sec-3-2-3)
+  - [Java and C](#sec-3-3)
+  - [Assembler](#sec-3-4)
+  - [LaTeX](#sec-3-5)
+  - [Markdown](#sec-3-6)
+  - [Python](#sec-3-7)
+  - [Haskell](#sec-3-8)
+  - [Matlab](#sec-3-9)
+- [Key bindings](#sec-4)
+- [License](#sec-5)
 
 
 # About<a id="sec-1" name="sec-1"></a>
@@ -142,12 +142,19 @@ of a package is installed.
 (defun newest-package-installed-p (package)
   "Return true if the newest available PACKAGE is installed."
   (when (package-installed-p package)
-    (let* ((local-pkg-desc (or (assq package package-alist)
-                               (assq package package--builtins)))
-           (newest-pkg-desc (assq package package-archive-contents)))
-      (and local-pkg-desc newest-pkg-desc
-           (version-list-= (package-desc-vers (cdr local-pkg-desc))
-                           (package-desc-vers (cdr newest-pkg-desc)))))))
+    (let* ((get-desc (if (version< emacs-version "24.4") 'cdr 'cadr))
+           (builtin-version  (assq package package--builtin-versions))
+           (local-pkg-desc   (assq package package-alist))
+           (newest-pkg-desc  (assq package package-archive-contents)))
+      (cond ((and local-pkg-desc newest-pkg-desc)
+             (version-list-= (package-desc-version
+                              (funcall get-desc local-pkg-desc))
+                             (package-desc-version 
+                              (funcall get-desc newest-pkg-desc))))
+            ((and builtin-version newest-pkg-desc)
+             (version-list-= builtin-version
+                             (package-desc-version 
+                              (funcall get-desc newest-pkg-desc))))))))
 ```
 
 Let's write a function to install a package if it is not installed or
@@ -159,13 +166,12 @@ in handy.
   "Unless the newest available version of PACKAGE is installed
 PACKAGE is installed and the current version is deleted."
   (unless (newest-package-installed-p package)
-    (let ((get-desc (if (version< emacs-version "24.4") 'cdr 'cadr))
-          (pkg-desc (assq package package-alist)))
+    (let ((pkg-desc (assq package package-alist)))
       (when pkg-desc
         (if (version< emacs-version "24.4")
             (package-delete (symbol-name package)
                             (package-version-join
-                             (package-desc-vers (get-desc pkg-desc))))
+                             (package-desc-vers (cdr pkg-desc))))
           (package-delete pkg-desc)))
       (and (assq package package-archive-contents)
            (package-install package)))))
diff --git a/init.el b/init.el
index 4e4cd94..fd5b4a2 100644
--- a/init.el
+++ b/init.el
@@ -58,12 +58,19 @@ tangled, and the tangled file is compiled."
 (defun newest-package-installed-p (package)
   "Return true if the newest available PACKAGE is installed."
   (when (package-installed-p package)
-    (let* ((local-pkg-desc (or (assq package package-alist)
-                               (assq package package--builtins)))
-           (newest-pkg-desc (assq package package-archive-contents)))
-      (and local-pkg-desc newest-pkg-desc
-           (version-list-= (package-desc-vers (cdr local-pkg-desc))
-                           (package-desc-vers (cdr newest-pkg-desc)))))))
+    (let* ((get-desc (if (version< emacs-version "24.4") 'cdr 'cadr))
+           (builtin-version  (assq package package--builtin-versions))
+           (local-pkg-desc   (assq package package-alist))
+           (newest-pkg-desc  (assq package package-archive-contents)))
+      (cond ((and local-pkg-desc newest-pkg-desc)
+             (version-list-= (package-desc-version
+                              (funcall get-desc local-pkg-desc))
+                             (package-desc-version 
+                              (funcall get-desc newest-pkg-desc))))
+            ((and builtin-version newest-pkg-desc)
+             (version-list-= builtin-version
+                             (package-desc-version 
+                              (funcall get-desc newest-pkg-desc))))))))
 
 ;; Let's write a function to install a package if it is not installed or
 ;;    upgrades it if a new version has been released. Here our predicate comes
@@ -73,13 +80,12 @@ tangled, and the tangled file is compiled."
   "Unless the newest available version of PACKAGE is installed
 PACKAGE is installed and the current version is deleted."
   (unless (newest-package-installed-p package)
-    (let ((get-desc (if (version< emacs-version "24.4") 'cdr 'cadr))
-          (pkg-desc (assq package package-alist)))
+    (let ((pkg-desc (assq package package-alist)))
       (when pkg-desc
         (if (version< emacs-version "24.4")
             (package-delete (symbol-name package)
                             (package-version-join
-                             (package-desc-vers (get-desc pkg-desc))))
+                             (package-desc-vers (cdr pkg-desc))))
           (package-delete pkg-desc)))
       (and (assq package package-archive-contents)
            (package-install package)))))
diff --git a/init.org b/init.org
index 05fa2e5..94080aa 100644
--- a/init.org
+++ b/init.org
@@ -111,12 +111,19 @@
      (defun newest-package-installed-p (package)
        "Return true if the newest available PACKAGE is installed."
        (when (package-installed-p package)
-         (let* ((local-pkg-desc (or (assq package package-alist)
-                                    (assq package package--builtins)))
-                (newest-pkg-desc (assq package package-archive-contents)))
-           (and local-pkg-desc newest-pkg-desc
-                (version-list-= (package-desc-vers (cdr local-pkg-desc))
-                                (package-desc-vers (cdr newest-pkg-desc)))))))
+         (let* ((get-desc (if (version< emacs-version "24.4") 'cdr 'cadr))
+                (builtin-version  (assq package package--builtin-versions))
+                (local-pkg-desc   (assq package package-alist))
+                (newest-pkg-desc  (assq package package-archive-contents)))
+           (cond ((and local-pkg-desc newest-pkg-desc)
+                  (version-list-= (package-desc-version
+                                   (funcall get-desc local-pkg-desc))
+                                  (package-desc-version 
+                                   (funcall get-desc newest-pkg-desc))))
+                 ((and builtin-version newest-pkg-desc)
+                  (version-list-= builtin-version
+                                  (package-desc-version 
+                                   (funcall get-desc newest-pkg-desc))))))))
    #+END_SRC
 
    Let's write a function to install a package if it is not installed or
@@ -128,13 +135,12 @@
        "Unless the newest available version of PACKAGE is installed
      PACKAGE is installed and the current version is deleted."
        (unless (newest-package-installed-p package)
-         (let ((get-desc (if (version< emacs-version "24.4") 'cdr 'cadr))
-               (pkg-desc (assq package package-alist)))
+         (let ((pkg-desc (assq package package-alist)))
            (when pkg-desc
              (if (version< emacs-version "24.4")
                  (package-delete (symbol-name package)
                                  (package-version-join
-                                  (package-desc-vers (get-desc pkg-desc))))
+                                  (package-desc-vers (cdr pkg-desc))))
                (package-delete pkg-desc)))
            (and (assq package package-archive-contents)
                 (package-install package)))))