diff --git a/doc/28_ref_optional_semantics.qbk b/doc/28_ref_optional_semantics.qbk
index 31dc178..78a628c 100644
--- a/doc/28_ref_optional_semantics.qbk
+++ b/doc/28_ref_optional_semantics.qbk
@@ -1181,7 +1181,7 @@ __SPACE__
 [: `bool operator != ( optional<T> const& x, none_t ) noexcept;`]
 [: `bool operator != ( none_t, optional<T> const& x ) noexcept;`]
 
-* [*Returns: ] `!( x == y );`
+* [*Returns: ] `bool(x);`
 
 
 __SPACE__
@@ -1268,4 +1268,4 @@ assert ( !optX );
 assert (addressof(*opt0) == addressof(y));
 ``
 
-[endsect]
\ No newline at end of file
+[endsect]