diff --git a/include/boost/mpl/aux_/config/operators.hpp b/include/boost/mpl/aux_/config/operators.hpp
index 2ac3ab8..66262a8 100644
--- a/include/boost/mpl/aux_/config/operators.hpp
+++ b/include/boost/mpl/aux_/config/operators.hpp
@@ -23,6 +23,7 @@
         || BOOST_WORKAROUND(__BORLANDC__, <= 0x600) \
         || BOOST_WORKAROUND(__EDG_VERSION__, <= 245) \
         || BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, <= 0x0295) \
+        || BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600)) \
         )
 
 #   define BOOST_MPL_CFG_USE_OPERATORS_OVERLOADING