diff --git a/tools/ndncatchunks3.cpp b/tools/ndncatchunks3.cpp
index 2b0e635..d84758a 100644
--- a/tools/ndncatchunks3.cpp
+++ b/tools/ndncatchunks3.cpp
@@ -53,7 +53,7 @@
 
 private:
   void
-  onData(const Interest& interest, Data& data);
+  onData(Data& data);
 
   void
   onTimeout(const Interest& interest);
@@ -84,7 +84,7 @@
           interest.setMustBeFresh(m_mustBeFresh);
 
           m_face.expressInterest(interest,
-                                 bind(&Consumer::onData, this, _1, _2),
+                                 bind(&Consumer::onData, this, _2),
                                  bind(&Consumer::onTimeout, this, _1));
         }
 
@@ -98,7 +98,7 @@
 }
 
 void
-Consumer::onData(const Interest& interest, Data& data)
+Consumer::onData(Data& data)
 {
   const Block& content = data.getContent();
   const Name& name = data.getName();
@@ -125,7 +125,7 @@
       interest.setMustBeFresh(m_mustBeFresh);
 
       m_face.expressInterest(interest,
-                             bind(&Consumer::onData, this, _1, _2),
+                             bind(&Consumer::onData, this, _2),
                              bind(&Consumer::onTimeout, this, _1));
     }
 }
diff --git a/tools/ndnputchunks3.cpp b/tools/ndnputchunks3.cpp
index 532b952..ca9475a 100644
--- a/tools/ndnputchunks3.cpp
+++ b/tools/ndnputchunks3.cpp
@@ -62,7 +62,7 @@
   }
 
   void
-  onInterest(const Name& name, const Interest& interest)
+  onInterest(const Interest& interest)
   {
     if (m_isVerbose)
       std::cerr << "<< I: " << interest << std::endl;
@@ -78,7 +78,9 @@
   void
   onRegisterFailed(const Name& prefix, const std::string& reason)
   {
-    std::cerr << "ERROR: Failed to register prefix in local hub's daemon (" << reason << ")" << std::endl;
+    std::cerr << "ERROR: Failed to register prefix '"
+              << prefix << "' in local hub's daemon (" << reason << ")"
+              << std::endl;
     m_face.shutdown();
   }
 
@@ -92,7 +94,7 @@
       }
 
     m_face.setInterestFilter(m_name,
-                             bind(&Producer::onInterest, this, _1, _2),
+                             bind(&Producer::onInterest, this, _2),
                              RegisterPrefixSuccessCallback(),
                              bind(&Producer::onRegisterFailed, this, _1, _2));
     m_face.processEvents();