diff --git a/include/boost/config/compiler/common_edg.hpp b/include/boost/config/compiler/common_edg.hpp
index e0e3fd3b..2d639de6 100644
--- a/include/boost/config/compiler/common_edg.hpp
+++ b/include/boost/config/compiler/common_edg.hpp
@@ -16,6 +16,7 @@
 
 #if (__EDG_VERSION__ <= 238)
 #   define BOOST_NO_VOID_RETURNS
+#   define BOOST_NO_INTEGRAL_INT64_T
 #endif
 
 #if (__EDG_VERSION__ <= 241) && !defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)