diff --git a/src/pcsc.hxx b/src/pcsc.hxx
index cacde09..5b2159e 100644
--- a/src/pcsc.hxx
+++ b/src/pcsc.hxx
@@ -76,7 +76,10 @@
 #if __cplusplus <= 199711L
   #include <boost/shared_ptr.hpp>
   namespace std {
-    typedef shared_ptr boost::shared_ptr;
+    template<class T> class shared_ptr: public boost::shared_ptr<T> {
+      public:
+        shared_ptr(T* p): boost::shared_ptr<T>(p) {}
+    };
   }
 #endif