diff --git a/common/rdr/FdOutStream.cxx b/common/rdr/FdOutStream.cxx
index d7da710..c4ca03f 100644
--- a/common/rdr/FdOutStream.cxx
+++ b/common/rdr/FdOutStream.cxx
@@ -35,6 +35,8 @@
 #include <unistd.h>
 #include <sys/time.h>
 #include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
 #endif
 
 /* Old systems have select() in sys/time.h */