diff --git a/apps/examples/xmlrpc2di/XMLRPC2DI.cpp b/apps/examples/xmlrpc2di/XMLRPC2DI.cpp
index aa61b645..aad25905 100644
--- a/apps/examples/xmlrpc2di/XMLRPC2DI.cpp
+++ b/apps/examples/xmlrpc2di/XMLRPC2DI.cpp
@@ -159,7 +159,7 @@ XMLRPCServerEntry* XMLRPC2DI::getServer(const string& app_name) {
   }
   server_mut.unlock();
 
-  DBG("found %d active connections for application %s\n", 
+  DBG("found %zd active connections for application %s\n", 
       scs.size(), app_name.c_str());  
   if (scs.empty()) {
     // no connections found