diff --git a/ndn-cpp/interest.hpp b/ndn-cpp/interest.hpp
index 149c606..c27af5b 100644
--- a/ndn-cpp/interest.hpp
+++ b/ndn-cpp/interest.hpp
@@ -107,6 +107,12 @@
     entries_.clear();
   }
   
+  /**
+   * Encode this Exclude with elements separated by "," and ndn_Exclude_ANY shown as "*".
+   * @return the URI string
+   */
+  std::string toUri() const;
+  
 private:
   std::vector<ExcludeEntry> entries_;
 };