diff --git a/lisp/ob-exp.el b/lisp/ob-exp.el
index 4a909c3f5..0f0cca3d9 100644
--- a/lisp/ob-exp.el
+++ b/lisp/ob-exp.el
@@ -43,6 +43,7 @@
 When set to nil no code will be evaluated as part of the export
 process."
   :group 'org-babel
+  :version "24.1"
   :type 'boolean)
 (put 'org-export-babel-evaluate 'safe-local-variable (lambda (x) (eq x nil)))