diff --git a/daemon/fw/forwarder.cpp b/daemon/fw/forwarder.cpp
index 1938c94..171a541 100644
--- a/daemon/fw/forwarder.cpp
+++ b/daemon/fw/forwarder.cpp
@@ -566,13 +566,13 @@
 }
 
 void
-Forwarder::insertDeadNonceList(pit::Entry& pitEntry, Face* upstream)
+Forwarder::insertDeadNonceList(pit::Entry& pitEntry, const Face* upstream)
 {
   // need Dead Nonce List insert?
   bool needDnl = true;
   if (pitEntry.isSatisfied) {
     BOOST_ASSERT(pitEntry.dataFreshnessPeriod >= 0_ms);
-    needDnl = static_cast<bool>(pitEntry.getInterest().getMustBeFresh()) &&
+    needDnl = pitEntry.getInterest().getMustBeFresh() &&
               pitEntry.dataFreshnessPeriod < m_deadNonceList.getLifetime();
   }
 
diff --git a/daemon/fw/forwarder.hpp b/daemon/fw/forwarder.hpp
index 6d4a068..51e4dd0 100644
--- a/daemon/fw/forwarder.hpp
+++ b/daemon/fw/forwarder.hpp
@@ -224,7 +224,7 @@
   NFD_VIRTUAL_WITH_TESTS void
   onNewNextHop(const Name& prefix, const fib::NextHop& nextHop);
 
-NFD_PROTECTED_WITH_TESTS_ELSE_PRIVATE:
+private:
   /** \brief set a new expiry timer (now + \p duration) on a PIT entry
    */
   void
@@ -234,8 +234,8 @@
    *  \param upstream if null, insert Nonces from all out-records;
    *                  if not null, insert Nonce only on the out-records of this face
    */
-  NFD_VIRTUAL_WITH_TESTS void
-  insertDeadNonceList(pit::Entry& pitEntry, Face* upstream);
+  void
+  insertDeadNonceList(pit::Entry& pitEntry, const Face* upstream);
 
 private:
   ForwarderCounters m_counters;