diff --git a/cast.htm b/cast.htm
index 00e7d0d..e1c466d 100644
--- a/cast.htm
+++ b/cast.htm
@@ -117,7 +117,7 @@ inline Derived polymorphic_downcast(Base* x);
 // Returns: static_cast<Derived>(x)
 
 template <class Derived, class Base>
-inline Derived polymorphic_pointer_cast(Base* x);
+inline auto polymorphic_pointer_cast(Base x);
 // Throws: std::bad_cast if ( dynamic_pointer_cast<Derived>(x) == 0 )
 // Returns: dynamic_pointer_cast<Derived>(x)