diff --git a/server.h b/server.h
index e129ffd..fe762c9 100644
--- a/server.h
+++ b/server.h
@@ -59,6 +59,7 @@
 
 struct cmd_probe_pdu {
 	uint8_t hostname[64];
+	uint8_t bigendian;
 	uint8_t fio_major;
 	uint8_t fio_minor;
 	uint8_t fio_patch;