--- ptlib-2.10.11/src/ptlib/unix/channel.cxx~	2013-08-15 01:20:26.000000000 +0200
+++ ptlib-2.10.11/src/ptlib/unix/channel.cxx~	2017-12-03 21:30:53.488398358 +0100
@@ -36,6 +36,7 @@ 
 
 #include <ptlib.h>
 #include <sys/ioctl.h>
+#include <sys/uio.h>
 
 
 #include "../common/pchannel.cxx"