diff --git a/include/boost/detail/shared_count.hpp b/include/boost/detail/shared_count.hpp
index 1eae671..4a71f20 100644
--- a/include/boost/detail/shared_count.hpp
+++ b/include/boost/detail/shared_count.hpp
@@ -28,8 +28,11 @@
 #include <boost/detail/bad_weak_ptr.hpp>
 #include <boost/detail/sp_counted_base.hpp>
 #include <boost/detail/sp_counted_impl.hpp>
-
-#include <memory>           // std::auto_ptr
+// In order to avoid circular dependencies with Boost.TR1
+// we make sure that our include of <memory> doesn't try to
+// pull in the TR1 headers: that's why we use this header 
+// rather than including <memory> directly:
+#include <boost/config/no_tr1/memory.hpp>  // std::auto_ptr
 #include <functional>       // std::less
 #include <new>              // std::bad_alloc
 
diff --git a/include/boost/shared_ptr.hpp b/include/boost/shared_ptr.hpp
index 2c9c3e6..dc39c7a 100644
--- a/include/boost/shared_ptr.hpp
+++ b/include/boost/shared_ptr.hpp
@@ -20,7 +20,11 @@
 #include <boost/detail/shared_ptr_nmt.hpp>
 #else
 
-#include <memory>               // for std::auto_ptr
+// In order to avoid circular dependencies with Boost.TR1
+// we make sure that our include of <memory> doesn't try to
+// pull in the TR1 headers: that's why we use this header 
+// rather than including <memory> directly:
+#include <boost/config/no_tr1/memory.hpp>  // std::auto_ptr
 
 #include <boost/assert.hpp>
 #include <boost/checked_delete.hpp>