fixed doc markup

diff --git a/doc/recipes.rst b/doc/recipes.rst
index 3387a35..3add4b7 100644 (file)
--- a/doc/recipes.rst
+++ b/doc/recipes.rst
@@ -240,4 +240,4 @@ does not return ``false``.
     As the resolution of functions and filters is done during compilation,
     there is no overhead when registering these callbacks.
 
-.. _callback:: http://www.php.net/manual/en/function.is-callable.php
+.. _callback: http://www.php.net/manual/en/function.is-callable.php