diff --git a/src/clients/iterative-query-controller.hpp b/src/clients/iterative-query-controller.hpp
index 8fc2a34..7f975da 100644
--- a/src/clients/iterative-query-controller.hpp
+++ b/src/clients/iterative-query-controller.hpp
@@ -78,7 +78,7 @@
   onData(const ndn::Interest& interest, const Data& data);
 
   void
-  onDataValidated(const shared_ptr<const Data>& data, NdnsType ndnsType);
+  onDataValidated(const shared_ptr<const Data>& data, NdnsContentType contentType);
 
   /**
    * @brief change the Controller state according to timeout. For current,