diff --git a/include/boost/config/compiler/vacpp.hpp b/include/boost/config/compiler/vacpp.hpp
index 01956d3a..36c8288f 100644
--- a/include/boost/config/compiler/vacpp.hpp
+++ b/include/boost/config/compiler/vacpp.hpp
@@ -30,6 +30,14 @@
 #  define BOOST_NO_INITIALIZER_LISTS
 #endif
 
+#if (__IBMCPP__ <= 1010)
+// XL C++ V10.1.0.0 may not always value-initialize a temporary object T(),
+// when T is a non-POD aggregate class type. Michael Wong (IBM Canada Ltd)
+// has confirmed this issue and gave it high priority.
+// -- Niels Dekker (LKEB), 2010.
+#  define BOOST_NO_COMPLETE_VALUE_INITIALIZATION
+#endif
+
 //
 // On AIX thread support seems to be indicated by _THREAD_SAFE:
 //