diff --git a/src/ccnx-tunnel.cpp b/src/ccnx-tunnel.cpp
index 6a7dd29..f428481 100644
--- a/src/ccnx-tunnel.cpp
+++ b/src/ccnx-tunnel.cpp
@@ -34,6 +34,8 @@
   Closure *cp = new TunnelClosure(closure, this, interest);
   CcnxWrapper::sendInterest(tunneledInterest, cp, selectors);
   delete cp;
+
+  return 0;
 }
 
 void