diff -ur texinfo-4.11-orig/system.h texinfo-4.11/system.h
--- texinfo-4.11-orig/system.h	2007-07-01 21:20:28.000000000 +0000
+++ texinfo-4.11/system.h	2008-03-24 01:02:31.000000000 +0000
@@ -154,7 +154,7 @@
 # define va_end(args)
 #endif
 
-#if O_BINARY
+#if O_BINARY && !defined(__BEOS__)
 # ifdef HAVE_IO_H
 #  include <io.h>
 # endif