Small checkpoint
diff --git a/ccnx/ccnx-selectors.cpp b/ccnx/ccnx-selectors.cpp
index 001c1b7..b349cc1 100644
--- a/ccnx/ccnx-selectors.cpp
+++ b/ccnx/ccnx-selectors.cpp
@@ -2,6 +2,8 @@
 #include "ccnx-common.h"
 #include <boost/lexical_cast.hpp>
 
+using namespace std;
+
 namespace Ccnx {
 
 Selectors::Selectors()
@@ -53,7 +55,7 @@
 {
   if (isEmpty())
   {
-    return CcnxCharbuf::Null;
+    return CcnxCharbufPtr ();
   }
   CcnxCharbufPtr ptr(new CcnxCharbuf());
   ccn_charbuf *cbuf = ptr->getBuf();