diff --git a/ccnx/ccnx-closure.cpp b/ccnx/ccnx-closure.cpp
index a96bbbe..312af6d 100644
--- a/ccnx/ccnx-closure.cpp
+++ b/ccnx/ccnx-closure.cpp
@@ -46,7 +46,7 @@
 
 
 void
-Closure::runDataCallback(const Name &name, const Bytes &content)
+Closure::runDataCallback(const Name &name, PcoPtr content)
 {
   if (!m_dataCallback.empty ())
     {