diff --git a/src/Add-ons/CMakeLists.txt b/src/Add-ons/CMakeLists.txt
index d0f29cbd4..c31a67881 100644
--- a/src/Add-ons/CMakeLists.txt
+++ b/src/Add-ons/CMakeLists.txt
@@ -11,6 +11,7 @@ set(HEADERS addon_fwd.hxx
             AddonManager.hxx
             AddonVersion.hxx
             exceptions.hxx
+            pointer_traits.hxx
             )
 
 flightgear_component(AddonManagement "${SOURCES}" "${HEADERS}")
diff --git a/src/Add-ons/pointer_traits.hxx b/src/Add-ons/pointer_traits.hxx
new file mode 100644
index 000000000..38f6b0e4b
--- /dev/null
+++ b/src/Add-ons/pointer_traits.hxx
@@ -0,0 +1,67 @@
+// -*- coding: utf-8 -*-
+//
+// pointer_traits.hxx --- Pointer traits classes
+// Copyright (C) 2018  Florent Rougon
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+#ifndef FG_ADDON_POINTER_TRAITS_HXX
+#define FG_ADDON_POINTER_TRAITS_HXX
+
+#include <memory>
+#include <utility>
+
+#include <simgear/structure/SGSharedPtr.hxx>
+
+namespace flightgear
+{
+
+namespace addons
+{
+
+template <typename T>
+struct shared_ptr_traits;
+
+template <typename T>
+struct shared_ptr_traits<SGSharedPtr<T>>
+{
+  using element_type = T;
+  using strong_ref = SGSharedPtr<T>;
+
+  template <typename ...Args>
+  static strong_ref makeStrongRef(Args&& ...args)
+  {
+    return strong_ref(new T(std::forward<Args>(args)...));
+  }
+};
+
+template <typename T>
+struct shared_ptr_traits<std::shared_ptr<T>>
+{
+  using element_type = T;
+  using strong_ref = std::shared_ptr<T>;
+
+  template <typename ...Args>
+  static strong_ref makeStrongRef(Args&& ...args)
+  {
+    return std::make_shared<T>(std::forward<Args>(args)...);
+  }
+};
+
+} // of namespace addons
+
+} // of namespace flightgear
+
+#endif  // of FG_ADDON_POINTER_TRAITS_HXX