diff -wbBur tvision/classes/x11/x11src.cc tvision.q/classes/x11/x11src.cc
--- tvision/classes/x11/x11src.cc	2009-12-29 15:52:24.000000000 +0000
+++ tvision.q/classes/x11/x11src.cc	2010-08-14 22:52:01.000000000 +0000
@@ -40,6 +40,9 @@
 // That's a nasty side effect: X defines Boolean!
 #if (defined(TVOS_UNIX) || defined(TVCompf_Cygwin)) && defined(HAVE_X11)
  #include <X11/Xmu/Atoms.h>
+ #include <sys/types.h>
+ #include <sys/stat.h>
+ #include <fcntl.h>
 #endif
 
 #define Uses_stdio