diff --git a/include/ndn-cpp/face.hpp b/include/ndn-cpp/face.hpp
index 7859000..de317c6 100644
--- a/include/ndn-cpp/face.hpp
+++ b/include/ndn-cpp/face.hpp
@@ -46,12 +46,15 @@
    * use func_lib::ref() as appropriate.
    * @param onTimeout A function object to call if the interest times out.  If onTimeout is an empty OnTimeout(), this does not use it.
    * This copies the function object, so you may need to use func_lib::ref() as appropriate.
+   * @param wireFormat A WireFormat object used to encode the message. If omitted, use WireFormat getDefaultWireFormat().
    * @return The pending interest ID which can be used with removePendingInterest.
    */
   uint64_t 
-  expressInterest(const Interest& interest, const OnData& onData, const OnTimeout& onTimeout = OnTimeout())
+  expressInterest
+    (const Interest& interest, const OnData& onData, const OnTimeout& onTimeout = OnTimeout(),
+     WireFormat& wireFormat = *WireFormat::getDefaultWireFormat())
   {
-    return node_.expressInterest(interest, onData, onTimeout);
+    return node_.expressInterest(interest, onData, onTimeout, wireFormat);
   }
 
   /**
@@ -63,10 +66,13 @@
    * use func_lib::ref() as appropriate.
    * @param onTimeout A function object to call if the interest times out.  If onTimeout is an empty OnTimeout(), this does not use it.
    * This copies the function object, so you may need to use func_lib::ref() as appropriate.
+   * @param wireFormat A WireFormat object used to encode the message. If omitted, use WireFormat getDefaultWireFormat().
    * @return The pending interest ID which can be used with removePendingInterest.
    */
   uint64_t 
-  expressInterest(const Name& name, const Interest *interestTemplate, const OnData& onData, const OnTimeout& onTimeout = OnTimeout());
+  expressInterest
+    (const Name& name, const Interest *interestTemplate, const OnData& onData, const OnTimeout& onTimeout = OnTimeout(),
+     WireFormat& wireFormat = *WireFormat::getDefaultWireFormat());
 
   /**
    * Encode name as an Interest, using a default interest lifetime.
@@ -76,12 +82,15 @@
    * use func_lib::ref() as appropriate.
    * @param onTimeout A function object to call if the interest times out.  If onTimeout is an empty OnTimeout(), this does not use it.
    * This copies the function object, so you may need to use func_lib::ref() as appropriate.
+   * @param wireFormat A WireFormat object used to encode the message. If omitted, use WireFormat getDefaultWireFormat().
    * @return The pending interest ID which can be used with removePendingInterest.
    */
   uint64_t 
-  expressInterest(const Name& name, const OnData& onData, const OnTimeout& onTimeout = OnTimeout()) 
+  expressInterest
+    (const Name& name, const OnData& onData, const OnTimeout& onTimeout = OnTimeout(),
+     WireFormat& wireFormat = *WireFormat::getDefaultWireFormat()) 
   {
-    return expressInterest(name, 0, onData, onTimeout);
+    return expressInterest(name, 0, onData, onTimeout, wireFormat);
   }
 
   /**
@@ -105,7 +114,7 @@
    * This calls onRegisterFailed(prefix) where prefix is the prefix given to registerPrefix.
    * @param flags The flags for finer control of which interests are forward to the application.  If omitted, use 
    * the default flags defined by the default ForwardingFlags constructor.
-   * @param wireFormat A WireFormat object used to encode the input. If omitted, use WireFormat getDefaultWireFormat().
+   * @param wireFormat A WireFormat object used to encode the message. If omitted, use WireFormat getDefaultWireFormat().
    * @return The registered prefix ID which can be used with removeRegisteredPrefix.
    */
   uint64_t 
diff --git a/include/ndn-cpp/node.hpp b/include/ndn-cpp/node.hpp
index d428378..5767be8 100644
--- a/include/ndn-cpp/node.hpp
+++ b/include/ndn-cpp/node.hpp
@@ -59,10 +59,11 @@
    * use func_lib::ref() as appropriate.
    * @param onTimeout A function object to call if the interest times out.  If onTimeout is an empty OnTimeout(), this does not use it.
    * This copies the function object, so you may need to use func_lib::ref() as appropriate.
+   * @param wireFormat A WireFormat object used to encode the message.
    * @return The pending interest ID which can be used with removePendingInterest.
    */
   uint64_t 
-  expressInterest(const Interest& interest, const OnData& onData, const OnTimeout& onTimeout);
+  expressInterest(const Interest& interest, const OnData& onData, const OnTimeout& onTimeout, WireFormat& wireFormat);
   
   /**
    * Remove the pending interest entry with the pendingInterestId from the pending interest table.
@@ -81,7 +82,7 @@
    * @param onRegisterFailed A function object to call if failed to retrieve the connected hub’s ID or failed to register the prefix.
    * This calls onRegisterFailed(prefix) where prefix is the prefix given to registerPrefix.
    * @param flags The flags for finer control of which interests are forward to the application.
-   * @param wireFormat A WireFormat object used to encode the input. If omitted, use WireFormat getDefaultWireFormat().
+   * @param wireFormat A WireFormat object used to encode the message.
    * @return The registered prefix ID which can be used with removeRegisteredPrefix.
    */
   uint64_t 
diff --git a/src/face.cpp b/src/face.cpp
index b137765..f5ce755 100644
--- a/src/face.cpp
+++ b/src/face.cpp
@@ -12,16 +12,18 @@
 namespace ndn {
   
 uint64_t 
-Face::expressInterest(const Name& name, const Interest *interestTemplate, const OnData& onData, const OnTimeout& onTimeout)
+Face::expressInterest
+  (const Name& name, const Interest *interestTemplate, const OnData& onData, const OnTimeout& onTimeout,
+   WireFormat& wireFormat)
 {
   if (interestTemplate)
     return node_.expressInterest(Interest
       (name, interestTemplate->getMinSuffixComponents(), interestTemplate->getMaxSuffixComponents(),
        interestTemplate->getPublisherPublicKeyDigest(), interestTemplate->getExclude(),
        interestTemplate->getChildSelector(), interestTemplate->getAnswerOriginKind(),
-       interestTemplate->getScope(), interestTemplate->getInterestLifetimeMilliseconds()), onData, onTimeout);
+       interestTemplate->getScope(), interestTemplate->getInterestLifetimeMilliseconds()), onData, onTimeout, wireFormat);
   else
-    return node_.expressInterest(Interest(name, 4000.0), onData, onTimeout);  
+    return node_.expressInterest(Interest(name, 4000.0), onData, onTimeout, wireFormat);  
 }
 
 void 
diff --git a/src/node.cpp b/src/node.cpp
index ade4a6e..a31144c 100644
--- a/src/node.cpp
+++ b/src/node.cpp
@@ -118,7 +118,7 @@
 }
 
 uint64_t 
-Node::expressInterest(const Interest& interest, const OnData& onData, const OnTimeout& onTimeout)
+Node::expressInterest(const Interest& interest, const OnData& onData, const OnTimeout& onTimeout, WireFormat& wireFormat)
 {
   // TODO: Properly check if we are already connected to the expected host.
   if (!transport_->getIsConnected())
@@ -128,7 +128,7 @@
   pendingInterestTable_.push_back(shared_ptr<PendingInterest>(new PendingInterest
     (pendingInterestId, shared_ptr<const Interest>(new Interest(interest)), onData, onTimeout)));
   
-  Blob encoding = interest.wireEncode();  
+  Blob encoding = interest.wireEncode(wireFormat);  
   transport_->send(*encoding);
   
   return pendingInterestId;
@@ -158,7 +158,7 @@
       (shared_ptr<NdndIdFetcher::Info>(new NdndIdFetcher::Info
         (this, registeredPrefixId, prefix, onInterest, onRegisterFailed, flags, wireFormat)));
     // It is OK for func_lib::function make a copy of the function object because the Info is in a shared_ptr.
-    expressInterest(ndndIdFetcherInterest_, fetcher, fetcher);
+    expressInterest(ndndIdFetcherInterest_, fetcher, fetcher, wireFormat);
   }
   else
     registerPrefixHelper(registeredPrefixId, make_shared<const Name>(prefix), onInterest, onRegisterFailed, flags, wireFormat);