diff --git a/bootp.c b/bootp.c
index 5bf59d7..dd54612 100644
--- a/bootp.c
+++ b/bootp.c
@@ -192,6 +192,8 @@
     rbp->bp_yiaddr = daddr.sin_addr; /* Client IP address */
     rbp->bp_siaddr = saddr.sin_addr; /* Server IP address */
 
+    daddr.sin_addr.s_addr = 0xffffffffu;
+
     q = rbp->bp_vend;
     memcpy(q, rfc1533_cookie, 4);
     q += 4;