diff --git a/pass-1/packet.c b/pass-1/packet.c
index b43832e..7b0395d 100644
--- a/pass-1/packet.c
+++ b/pass-1/packet.c
@@ -58,6 +58,7 @@ int wrap_ipv4_packet(struct rlocs* reg, struct recv_pkt* pkt, struct rsp_data* o
     wrap_hdr->ihl      = wrap_hdr_size / 4;
     wrap_hdr->ttl      = IPDEFTTL;
     wrap_hdr->protocol = IPPROTO_HIDE_EID;
+    wrap_hdr->frag_off = htons( 0x4000 ); // DF bit set
     
     out->iovs[0].iov_base = wrap_hdr;
     out->iovs[0].iov_len = wrap_hdr_size;