diff --git a/helper/ndn-face-container.cpp b/helper/ndn-face-container.cpp
index 150eea3..bd03ed0 100644
--- a/helper/ndn-face-container.cpp
+++ b/helper/ndn-face-container.cpp
@@ -87,12 +87,12 @@
 // }
 
 void
-FaceContainer::Add(const Ptr<Face>& face)
+FaceContainer::Add(const shared_ptr<Face>& face)
 {
   m_faces.push_back(face);
 }
 
-Ptr<Face>
+shared_ptr<Face>
 FaceContainer::Get(FaceContainer::Iterator i) const
 {
   return *i;