--- rxvt-unicode/configure	2011/01/03 03:05:46	1.140
+++ rxvt-unicode/configure	2011/01/03 10:32:07	1.141
@@ -6398,6 +6398,7 @@
 
 
 for ac_header in \
+	sys/byteorder.h \
 	sys/ioctl.h \
 	sys/sockio.h \
 	sys/strredir.h \