diff --git a/include/boost/regex/v4/match_flags.hpp b/include/boost/regex/v4/match_flags.hpp
index 0ac8f8cf..1dc4a5c9 100644
--- a/include/boost/regex/v4/match_flags.hpp
+++ b/include/boost/regex/v4/match_flags.hpp
@@ -72,7 +72,7 @@ typedef enum _match_flags
 
 } match_flags;
 
-#if BOOST_WORKAROUND(BOOST_MSVC, <= 1200) || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
+#if BOOST_WORKAROUND(BOOST_MSVC, <= 1200) || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) || defined(__SUNPRO_CC)
 typedef unsigned long match_flag_type;
 #else
 typedef match_flags match_flag_type;
diff --git a/include/boost/regex/v4/perl_matcher_common.hpp b/include/boost/regex/v4/perl_matcher_common.hpp
index 7a454047..20148375 100644
--- a/include/boost/regex/v4/perl_matcher_common.hpp
+++ b/include/boost/regex/v4/perl_matcher_common.hpp
@@ -54,7 +54,7 @@ perl_matcher<BidiIterator, Allocator, traits, Allocator2>::perl_matcher(BidiIter
    estimate_max_state_count(static_cast<category*>(0));
    if(!(m_match_flags & (match_perl|match_posix)))
    {
-      if(re.flags() & regex_constants::perlex)
+      if((re.flags() & regex_constants::perlex) || (re.flags() & regex_constants::literal))
          m_match_flags |= match_perl;
       else
          m_match_flags |= match_posix;