diff --git a/include/boost/io/quoted.hpp b/include/boost/io/quoted.hpp
index 44570e2..7f67917 100644
--- a/include/boost/io/quoted.hpp
+++ b/include/boost/io/quoted.hpp
@@ -20,19 +20,10 @@ namespace io {
 namespace detail {
 
 template<class String, class Char>
-class quoted_proxy {
-public:
-    quoted_proxy(String string_, Char escape_, Char delim_)
-        : string(string_)
-        , escape(escape_)
-        , delim(delim_) { }
-
+struct quoted_proxy {
     String string;
     Char escape;
     Char delim;
-
-private:
-    quoted_proxy& operator=(const quoted_proxy&);
 };
 
 template<class Char, class Traits>
@@ -74,35 +65,35 @@ quoted_output(std::basic_ostream<Char, Traits>& os,
 template <class Char, class Traits, class Alloc>
 inline std::basic_ostream<Char, Traits>&
 operator<<(std::basic_ostream<Char, Traits>& os,
-    const quoted_proxy<const std::basic_string<Char, Traits, Alloc>&,
+    const quoted_proxy<const std::basic_string<Char, Traits, Alloc>*,
         Char>& proxy)
 {
-    return boost::io::detail::quoted_output(os, proxy.string, proxy.escape,
+    return boost::io::detail::quoted_output(os, *proxy.string, proxy.escape,
         proxy.delim);
 }
 
 template<class Char, class Traits, class Alloc>
 inline std::basic_ostream<Char, Traits>&
 operator<<(std::basic_ostream<Char, Traits>& os,
-    const quoted_proxy<std::basic_string<Char, Traits, Alloc>&, Char>& proxy)
+    const quoted_proxy<std::basic_string<Char, Traits, Alloc>*, Char>& proxy)
 {
-    return boost::io::detail::quoted_output(os, proxy.string, proxy.escape,
+    return boost::io::detail::quoted_output(os, *proxy.string, proxy.escape,
         proxy.delim);
 }
 
 template<class Char, class Traits, class Alloc>
 inline std::basic_istream<Char, Traits>&
 operator>>(std::basic_istream<Char, Traits>& is,
-    const quoted_proxy<std::basic_string<Char, Traits, Alloc>&, Char>& proxy)
+    const quoted_proxy<std::basic_string<Char, Traits, Alloc>*, Char>& proxy)
 {
-    proxy.string.clear();
+    proxy.string->clear();
     Char ch;
     if (!(is >> ch).good()) {
         return is;
     }
     if (ch != proxy.delim) {
         is.unget();
-        is >> proxy.string;
+        is >> *proxy.string;
         return is;
     }
     {
@@ -112,7 +103,7 @@ operator>>(std::basic_istream<Char, Traits>& is,
             if (ch == proxy.escape && !(is >> ch).good()) {
                 break;
             }
-            proxy.string.push_back(ch);
+            proxy.string->push_back(ch);
         }
     }
     return is;
@@ -121,29 +112,32 @@ operator>>(std::basic_istream<Char, Traits>& is,
 } /* detail */
 
 template<class Char, class Traits, class Alloc>
-inline detail::quoted_proxy<const std::basic_string<Char, Traits, Alloc>&,
+inline detail::quoted_proxy<const std::basic_string<Char, Traits, Alloc>*,
     Char>
 quoted(const std::basic_string<Char, Traits, Alloc>& s, Char escape='\\',
     Char delim='\"')
 {
-    return detail::quoted_proxy<const std::basic_string<Char, Traits, Alloc>&,
-        Char>(s, escape, delim);
+    detail::quoted_proxy<const std::basic_string<Char, Traits, Alloc>*,
+        Char> proxy = { &s, escape, delim };
+    return proxy;
 }
 
 template<class Char, class Traits, class Alloc>
-inline detail::quoted_proxy<std::basic_string<Char, Traits, Alloc>&, Char>
+inline detail::quoted_proxy<std::basic_string<Char, Traits, Alloc>*, Char>
 quoted(std::basic_string<Char, Traits, Alloc>& s, Char escape='\\',
     Char delim='\"')
 {
-    return detail::quoted_proxy<std::basic_string<Char, Traits, Alloc>&,
-        Char>(s, escape, delim);
+    detail::quoted_proxy<std::basic_string<Char, Traits, Alloc>*,
+        Char> proxy = { &s, escape, delim };
+    return proxy;
 }
 
 template<class Char>
 inline detail::quoted_proxy<const Char*, Char>
 quoted(const Char* s, Char escape='\\', Char delim='\"')
 {
-    return detail::quoted_proxy<const Char*, Char>(s, escape, delim);
+    detail::quoted_proxy<const Char*, Char> proxy = { s, escape, delim };
+    return proxy;
 }
 
 } /* io */