diff --git a/include/ndn-cpp/exclude.hpp b/include/ndn-cpp/exclude.hpp
index 276aa5b..e26ec31 100644
--- a/include/ndn-cpp/exclude.hpp
+++ b/include/ndn-cpp/exclude.hpp
@@ -95,6 +95,12 @@
    */
   inline bool
   empty () const;
+
+  /**
+   * @brief Clear the exclude filter
+   */
+  inline void
+  clear();
   
   /**
    * @brief Get number of exclude terms
@@ -177,6 +183,13 @@
   return m_exclude.empty ();
 }
 
+inline void
+Exclude::clear ()
+{
+  m_exclude.clear ();
+}
+
+
 inline size_t
 Exclude::size () const
 {
diff --git a/include/ndn-cpp/interest.hpp b/include/ndn-cpp/interest.hpp
index e55a554..8fe3119 100644
--- a/include/ndn-cpp/interest.hpp
+++ b/include/ndn-cpp/interest.hpp
@@ -136,8 +136,10 @@
    * @brief Get Interest's nonce
    *
    * If nonce was not set before this call, it will be automatically assigned to a random value
+   *
+   * Const reference needed for C decoding
    */
-  uint32_t
+  const uint32_t&
   getNonce() const;
     
   void