diff --git a/include/boost/config/compiler/metrowerks.hpp b/include/boost/config/compiler/metrowerks.hpp
index a74cadef..a2332b58 100644
--- a/include/boost/config/compiler/metrowerks.hpp
+++ b/include/boost/config/compiler/metrowerks.hpp
@@ -39,6 +39,7 @@
 
 #   if(__MWERKS__ <= 0x3204)  // 9.3
 #     define BOOST_NO_MEMBER_TEMPLATE_FRIENDS
+#     define BOOST_NO_IS_ABSTRACT
 #    endif
 
 #if !__option(wchar_type)
diff --git a/include/boost/config/compiler/sunpro_cc.hpp b/include/boost/config/compiler/sunpro_cc.hpp
index 8a61199f..730940af 100644
--- a/include/boost/config/compiler/sunpro_cc.hpp
+++ b/include/boost/config/compiler/sunpro_cc.hpp
@@ -34,7 +34,7 @@
 #      define BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
 #    endif
 
-#    if (__SUNPRO_CC <= 0x530) || !defined(BOOST_STRICT_CONFIG)
+#    if (__SUNPRO_CC <= 0x530) 
        // Requesting debug info (-g) with Boost.Python results
        // in an internal compiler error for "static const"
        // initialized in-class.
@@ -64,6 +64,7 @@
 #      define BOOST_NO_INCLASS_MEMBER_INITIALIZATION
 #      define BOOST_NO_SFINAE
 #      define BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS
+#      define BOOST_NO_IS_ABSTRACT
 #    endif
 
 #define BOOST_COMPILER "Sun compiler version " BOOST_STRINGIZE(__SUNPRO_CC)
@@ -75,8 +76,8 @@
 #error "Compiler not supported or configured - please reconfigure"
 #endif
 //
-// last known and checked version is 0x530:
-#if (__SUNPRO_CC > 0x530)
+// last known and checked version is 0x540:
+#if (__SUNPRO_CC > 0x540)
 #  if defined(BOOST_ASSERT_CONFIG)
 #     error "Unknown compiler version - please run the configure tests and report the results"
 #  endif