diff --git a/test/objects/test.hpp b/test/objects/test.hpp
index b3d9c2e8..3b80d6c0 100644
--- a/test/objects/test.hpp
+++ b/test/objects/test.hpp
@@ -185,7 +185,7 @@ namespace test {
   };
 
   // Note: This is a deliberately bad hash function.
-  class hash
+  class hash BOOST_FINAL
   {
     int type_;
 
@@ -298,7 +298,7 @@ namespace test {
     }
   };
 
-  class equal_to
+  class equal_to BOOST_FINAL
   {
     int type_;