diff --git a/apps/xmlrpc2di/xmlrpc++/src/XmlRpcDispatch.cpp b/apps/xmlrpc2di/xmlrpc++/src/XmlRpcDispatch.cpp
index 13d09162..48e572fb 100644
--- a/apps/xmlrpc2di/xmlrpc++/src/XmlRpcDispatch.cpp
+++ b/apps/xmlrpc2di/xmlrpc++/src/XmlRpcDispatch.cpp
@@ -194,7 +194,7 @@ XmlRpcDispatch::waitForAndProcessEvents(double timeout)
   // Check for events
   int nEvents;
   if (_endTime < 0.0)
-    nEvents = poll(fds,_sources.size(), NULL);
+    nEvents = poll(fds,_sources.size(), -1);
   else 
   {
     int to_ms = (int)floor(1000.0 * timeout);