diff --git a/examples/interest-header-example.cc b/examples/interest-header-example.cc
index 080e5a5..6964440 100644
--- a/examples/interest-header-example.cc
+++ b/examples/interest-header-example.cc
@@ -72,8 +72,7 @@
   uint32_t randomNonce = static_cast<uint32_t> (random.GetValue());
   interestHeader.SetNonce(randomNonce);
     
-  interestHeader.SetNack(true);
-  interestHeader.SetCongested(true);
+  interestHeader.SetNack(CcnxInterestHeader::NACK_CONGESTION);
   NS_LOG_INFO ("Source: \n" << interestHeader);
     
   packet.AddHeader (interestHeader);