diff --git a/include/boost/archive/basic_streambuf_locale_saver.hpp b/include/boost/archive/basic_streambuf_locale_saver.hpp
index 88c96f00..6efc706a 100644
--- a/include/boost/archive/basic_streambuf_locale_saver.hpp
+++ b/include/boost/archive/basic_streambuf_locale_saver.hpp
@@ -69,7 +69,11 @@ public:
         m_locale(s.getloc())
     {}
     ~basic_ios_locale_saver(){
+        // libc++ doesn't support std::[w]ostream.sync()
+        // but gcc will throw an error if sync() isn't invoked
+        #ifndef _LIBCPP_VERSION
         m_ios.sync();
+        #endif
         m_ios.imbue(m_locale);
     }
 private:
diff --git a/include/boost/archive/impl/basic_text_iprimitive.ipp b/include/boost/archive/impl/basic_text_iprimitive.ipp
index 8e3fbbfe..d7f72eb5 100644
--- a/include/boost/archive/impl/basic_text_iprimitive.ipp
+++ b/include/boost/archive/impl/basic_text_iprimitive.ipp
@@ -119,9 +119,10 @@ basic_text_iprimitive<IStream>::basic_text_iprimitive(
     locale_saver(is)
 {
     if(! no_codecvt){
-        is.imbue(archive_locale);
+        is_.sync();
+        is_.imbue(archive_locale);
     }
-    is >> std::noboolalpha;
+    is_ >> std::noboolalpha;
 }
 #else
 {}
diff --git a/include/boost/archive/impl/basic_text_oprimitive.ipp b/include/boost/archive/impl/basic_text_oprimitive.ipp
index 62bbc72c..5e3e203c 100644
--- a/include/boost/archive/impl/basic_text_oprimitive.ipp
+++ b/include/boost/archive/impl/basic_text_oprimitive.ipp
@@ -93,9 +93,14 @@ basic_text_oprimitive<OStream>::basic_text_oprimitive(
     locale_saver(os)
 {
     if(! no_codecvt){
-        os.imbue(archive_locale);
+        // libc++ doesn't support std::wostream.sync()
+        // but gcc will throw an error if sync() isn't invoked
+        #ifndef _LIBCPP_VERSION
+        os_.sync();
+        #endif
+        os_.imbue(archive_locale);
     }
-    os << std::noboolalpha;
+    os_ << std::noboolalpha;
 }
 #else
 {}
diff --git a/include/boost/archive/impl/xml_wiarchive_impl.ipp b/include/boost/archive/impl/xml_wiarchive_impl.ipp
index c99df6a6..30314e1a 100644
--- a/include/boost/archive/impl/xml_wiarchive_impl.ipp
+++ b/include/boost/archive/impl/xml_wiarchive_impl.ipp
@@ -163,8 +163,8 @@ xml_wiarchive_impl<Archive>::xml_wiarchive_impl(
             is_.getloc(),
             new boost::archive::detail::utf8_codecvt_facet
         );
-        is.sync();
-        is.imbue(l);
+        is_.sync();
+        is_.imbue(l);
     }
     if(0 == (flags & no_header))
         init();
diff --git a/include/boost/archive/impl/xml_woarchive_impl.ipp b/include/boost/archive/impl/xml_woarchive_impl.ipp
index 67dc1181..6fd5d7b2 100644
--- a/include/boost/archive/impl/xml_woarchive_impl.ipp
+++ b/include/boost/archive/impl/xml_woarchive_impl.ipp
@@ -125,8 +125,12 @@ xml_woarchive_impl<Archive>::xml_woarchive_impl(
             os_.getloc(),
             new boost::archive::detail::utf8_codecvt_facet
         );
-        os.sync();
-        os.imbue(l);
+        // libc++ doesn't support std::[w]ostream.sync()
+        // but gcc will throw an error if sync() isn't invoked
+        #ifndef _LIBCPP_VERSION
+        os_.sync();
+        #endif
+        os_.imbue(l);
     }
     if(0 == (flags & no_header))
         this->init();