diff --git a/include/boost/type_traits/is_polymorphic.hpp b/include/boost/type_traits/is_polymorphic.hpp
index 2563578..afba32b 100644
--- a/include/boost/type_traits/is_polymorphic.hpp
+++ b/include/boost/type_traits/is_polymorphic.hpp
@@ -40,7 +40,7 @@ struct is_polymorphic_imp1
       // for some reason this messes up VC++ when T has virtual bases,
       // probably likewise for compilers that use the same ABI:
       struct unique{};
-      virtual void foo(unique*);
+      virtual void unique_name_to_boost5487629(unique*);
 #  endif
       char padding[256];
    };