diff --git a/include/boost/config/compiler/sunpro_cc.hpp b/include/boost/config/compiler/sunpro_cc.hpp
index 925475a4..eb91454d 100644
--- a/include/boost/config/compiler/sunpro_cc.hpp
+++ b/include/boost/config/compiler/sunpro_cc.hpp
@@ -22,6 +22,9 @@
        // to disable it until suppport becomes more stable
        // (J Maddock 6th May 2001).
 #      define BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+       // integral constant expressions with 64 bit numbers fail
+#      define BOOST_NO_INTEGRAL_INT64_T
 #    endif
 #    if __SUNPRO_CC <= 0x500
 #      define BOOST_NO_MEMBER_TEMPLATES