diff --git a/sys/nfsclient/bootp_subr.c b/sys/nfsclient/bootp_subr.c
index 8d3ad2a2a2ac..1221135cbda4 100644
--- a/sys/nfsclient/bootp_subr.c
+++ b/sys/nfsclient/bootp_subr.c
@@ -101,7 +101,7 @@ struct bootp_packet {
 	unsigned char chaddr[16];
 	char sname[64];
 	char file[128];
-	unsigned char vend[256];
+	unsigned char vend[1222];
 };
 
 struct bootpc_ifcontext {