diff --git a/example/demo_pimpl_A.cpp b/example/demo_pimpl_A.cpp
new file mode 100644
index 0000000..455b71e
--- /dev/null
+++ b/example/demo_pimpl_A.cpp
@@ -0,0 +1,45 @@
+/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
+// demo_pimpl_A.cpp
+
+// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/archive/text_iarchive.hpp>
+#include <boost/archive/text_oarchive.hpp>
+
+#include "demo_pimpl_A.hpp"
+
+// "hidden" definition of class B
+struct B {
+    int b;
+    template<class Archive>
+    void serialize(Archive & ar, const unsigned int /* file_version */){
+        ar & b;
+    }
+};
+
+A::A() :
+    pimpl(new B)
+{}
+A::~A(){
+    delete pimpl;
+}
+// now we can define the serialization for class A
+template<class Archive>
+void A::serialize(Archive & ar, const unsigned int /* file_version */){
+    ar & pimpl;
+}
+ 
+// without the explicit instantiations below, the program will
+// fail to link for lack of instantiantiation of the above function
+// note: the following failed to fix link errors for vc 7.0 !
+template void A::serialize<boost::archive::text_iarchive>(
+    boost::archive::text_iarchive & ar, 
+    const unsigned int file_version
+);
+template void A::serialize<boost::archive::text_oarchive>(
+    boost::archive::text_oarchive & ar, 
+    const unsigned int file_version
+);