Index: boost/smart_ptr/detail/sp_convertible.hpp
===================================================================
--- boost/smart_ptr/detail/sp_convertible.hpp	(revision 61342)
+++ boost/smart_ptr/detail/sp_convertible.hpp	(working copy)
@@ -45,7 +45,7 @@
     static yes f( T* );
     static no  f( ... );
 
-    enum _vt { value = sizeof( f( static_cast<Y*>(0) ) ) == sizeof(yes) };
+    enum _vt { value = sizeof( (f)( static_cast<Y*>(0) ) ) == sizeof(yes) };
 };
 
 struct sp_empty