diff --git a/include/boost/config/compiler/vacpp.hpp b/include/boost/config/compiler/vacpp.hpp
index 6f34ba6e..e085a60d 100644
--- a/include/boost/config/compiler/vacpp.hpp
+++ b/include/boost/config/compiler/vacpp.hpp
@@ -26,7 +26,6 @@
 #endif
 
 #if (__IBMCPP__ <= 600) || !defined(BOOST_STRICT_CONFIG)
-#  define BOOST_NO_INCLASS_MEMBER_INITIALIZATION
 #  define BOOST_NO_POINTER_TO_MEMBER_TEMPLATE_PARAMETERS
 #endif