diff --git a/LaunchAPPL/Client/StreamBasedLauncher.cc b/LaunchAPPL/Client/StreamBasedLauncher.cc
index bb8eb6ccb0..668d6c1dce 100644
--- a/LaunchAPPL/Client/StreamBasedLauncher.cc
+++ b/LaunchAPPL/Client/StreamBasedLauncher.cc
@@ -2,6 +2,7 @@
 #include "Stream.h"
 #include "ServerProtocol.h"
 #include <iostream>
+#include <sstream>
 #include <arpa/inet.h>
 
 StreamBasedLauncher::StreamBasedLauncher(boost::program_options::variables_map &options)