diff --git a/include/boost/mpl/assert.hpp b/include/boost/mpl/assert.hpp
index da1d7ce..105249b 100644
--- a/include/boost/mpl/assert.hpp
+++ b/include/boost/mpl/assert.hpp
@@ -36,6 +36,7 @@
 
 #if BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, < 0x600) \
     || (BOOST_MPL_CFG_GCC != 0)
+    || BOOST_WORKAROUND(__IBMCPP__, <= 600)
 #   define BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES
 #endif