diff --git a/tools/chunks/catchunks/pipeline-interests.cpp b/tools/chunks/catchunks/pipeline-interests.cpp
index 965492f..c0512cc 100644
--- a/tools/chunks/catchunks/pipeline-interests.cpp
+++ b/tools/chunks/catchunks/pipeline-interests.cpp
@@ -36,10 +36,11 @@
 PipelineInterests::PipelineInterests(Face& face)
   : m_face(face)
   , m_lastSegmentNo(0)
-  , m_excludedSegmentNo(0)
-  , m_receivedSize(0)
   , m_nReceived(0)
+  , m_receivedSize(0)
   , m_hasFinalBlockId(false)
+  , m_nextSegmentNo(0)
+  , m_excludedSegmentNo(0)
   , m_isStopping(false)
 {
 }
@@ -78,6 +79,16 @@
   doCancel();
 }
 
+uint64_t
+PipelineInterests::getNextSegmentNo()
+{
+  // skip the excluded segment
+  if (m_nextSegmentNo == m_excludedSegmentNo)
+    m_nextSegmentNo++;
+
+  return m_nextSegmentNo++;
+}
+
 void
 PipelineInterests::onFailure(const std::string& reason)
 {
@@ -116,8 +127,8 @@
 void
 PipelineInterests::printSummary() const
 {
-  typedef time::duration<double, time::milliseconds::period> Milliseconds;
-  Milliseconds timeElapsed = time::steady_clock::now() - getStartTime();
+  using namespace ndn::time;
+  duration<double, milliseconds::period> timeElapsed = steady_clock::now() - getStartTime();
   double throughput = (8 * m_receivedSize * 1000) / timeElapsed.count();
 
   std::cerr << "\nAll segments have been received.\n"