diff --git a/utils/trie/multi-policy.h b/utils/trie/multi-policy.h
index e662aff..314a2a0 100644
--- a/utils/trie/multi-policy.h
+++ b/utils/trie/multi-policy.h
@@ -163,6 +163,8 @@
     
     template< typename U > void operator() (U index)
     {
+      if (!m_name.empty ())
+        m_name += "::";
       m_name += boost::mpl::at_c< policy_traits, U::value >::type::GetName ();
     }