diff --git a/contrib/babel/lisp/langs/org-babel-asymptote.el b/contrib/babel/lisp/langs/org-babel-asymptote.el
index 1e8a06054..b44e72699 100644
--- a/contrib/babel/lisp/langs/org-babel-asymptote.el
+++ b/contrib/babel/lisp/langs/org-babel-asymptote.el
@@ -38,6 +38,12 @@
 ;;
 ;; 4) there are no variables (at least for now)
 
+;;; Requirements:
+
+;; - The asymptote program :: http://asymptote.sourceforge.net/
+;;
+;; - asy-mode :: Major mode for editing asymptote files
+
 ;;; Code:
 (require 'org-babel)
 
diff --git a/lisp/org-src.el b/lisp/org-src.el
index d09e540a9..5cd2fc670 100644
--- a/lisp/org-src.el
+++ b/lisp/org-src.el
@@ -110,7 +110,8 @@ or similar things which you want to have when editing a source code file,
 but which mess up the display of a snippet in Org exported files.")
 
 (defcustom org-src-lang-modes
-  '(("ocaml" . tuareg) ("elisp" . emacs-lisp) ("ditaa" . artist))
+  '(("ocaml" . tuareg) ("elisp" . emacs-lisp) ("ditaa" . artist)
+    ("asymptote" . asy))
   "Alist mapping languages to their major mode.
 The key is the language name, the value is the string that should
 be inserted as the name of the major mode.  For many languages this is