diff --git a/include/boost/container_hash/extensions.hpp b/include/boost/container_hash/extensions.hpp
index 94adfa5..cc1a421 100644
--- a/include/boost/container_hash/extensions.hpp
+++ b/include/boost/container_hash/extensions.hpp
@@ -26,10 +26,6 @@
 # include <tuple>
 #endif
 
-#if !defined(BOOST_NO_CXX11_SMART_PTR)
-#  include <memory>
-#endif
-
 namespace boost
 {
 #if !defined(BOOST_NO_CXX11_HDR_TUPLE)
@@ -134,18 +130,6 @@ namespace boost
 
 #endif
 
-#endif
-
-#if !defined(BOOST_NO_CXX11_SMART_PTR)
-    template <typename T>
-    inline std::size_t hash_value(std::shared_ptr<T> const& x) {
-        return boost::hash_value(x.get());
-    }
-
-    template <typename T, typename Deleter>
-    inline std::size_t hash_value(std::unique_ptr<T, Deleter> const& x) {
-        return boost::hash_value(x.get());
-    }
 #endif
 
     //
diff --git a/include/boost/container_hash/hash.hpp b/include/boost/container_hash/hash.hpp
index 4ab436b..c4ba130 100644
--- a/include/boost/container_hash/hash.hpp
+++ b/include/boost/container_hash/hash.hpp
@@ -34,6 +34,10 @@
 #include <utility>
 #include <climits>
 
+#if !defined(BOOST_NO_CXX11_SMART_PTR)
+# include <memory>
+#endif
+
 #if !defined(BOOST_NO_CXX11_HDR_TYPEINDEX)
 #include <typeindex>
 #endif
@@ -244,6 +248,24 @@ namespace boost
         return boost::hash_unordered_range( v.begin(), v.end() );
     }
 
+#endif
+
+    // std::unique_ptr, std::shared_ptr
+
+#if !defined(BOOST_NO_CXX11_SMART_PTR)
+
+    template <typename T>
+    std::size_t hash_value( std::shared_ptr<T> const& x )
+    {
+        return boost::hash_value( x.get() );
+    }
+
+    template <typename T, typename Deleter>
+    std::size_t hash_value( std::unique_ptr<T, Deleter> const& x )
+    {
+        return boost::hash_value( x.get() );
+    }
+
 #endif
 
     // std::type_index