diff --git a/include/boost/config/compiler/vacpp.hpp b/include/boost/config/compiler/vacpp.hpp
index e085a60d..4cf0de7c 100644
--- a/include/boost/config/compiler/vacpp.hpp
+++ b/include/boost/config/compiler/vacpp.hpp
@@ -27,6 +27,7 @@
 
 #if (__IBMCPP__ <= 600) || !defined(BOOST_STRICT_CONFIG)
 #  define BOOST_NO_POINTER_TO_MEMBER_TEMPLATE_PARAMETERS
+#  define BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES 1
 #endif
 
 //