--- a/doc/book/en/tutorials/base/customizing-the-application.rst	Wed Mar 26 12:30:52 2014 +0100
+++ b/doc/book/en/tutorials/base/customizing-the-application.rst	Tue Apr 22 16:39:19 2014 +0200
@@ -268,7 +268,7 @@
   but this is not mandatory.
 
 * When we want to write something to the output stream, we simply call `self.w`,
-  with *must be passed an unicode string*.
+  which *must be passed a unicode string*.
 
 * The latest function is the most exotic stuff. The point is that without it, you
   would get an error at display time because the framework wouldn't be able to