diff --git a/doc/typeof.qbk b/doc/typeof.qbk
index d396054..f0e5778 100644
--- a/doc/typeof.qbk
+++ b/doc/typeof.qbk
@@ -590,8 +590,8 @@ which takes care of `typename` inside the `typeof` expression.
     template<typename A, typename B>
     struct result_of_conditional 
     {
-	BOOST_TYPEOF_NESTED_TYPEDEF_TPL(nested,true?A():B());
-	typedef typename nested::type type;
+        BOOST_TYPEOF_NESTED_TYPEDEF_TPL(nested,true?A():B());
+        typedef typename nested::type type;
     };
 
     template<typename A, typename B>