diff --git a/daemon/face/ndnlp-partial-message-store.hpp b/daemon/face/ndnlp-partial-message-store.hpp
index 7cd3df8..74e3fd9 100644
--- a/daemon/face/ndnlp-partial-message-store.hpp
+++ b/daemon/face/ndnlp-partial-message-store.hpp
@@ -52,8 +52,8 @@
 class PartialMessageStore : noncopyable
 {
 public:
-  PartialMessageStore(Scheduler& scheduler,
-    const time::nanoseconds& idleDuration = time::milliseconds(100));
+  explicit
+  PartialMessageStore(const time::nanoseconds& idleDuration = time::milliseconds(100));
 
   virtual
   ~PartialMessageStore();
@@ -79,7 +79,6 @@
 private:
   std::map<uint64_t, shared_ptr<PartialMessage> > m_partialMessages;
 
-  Scheduler& m_scheduler;
   time::nanoseconds m_idleDuration;
 };