diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 3857f81..769a2c9 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -649,6 +649,10 @@
 		m->hdr.seq = cpu_to_le64(++con->out_seq);
 		m->needs_out_seq = false;
 	}
+#ifdef CONFIG_BLOCK
+	else
+		m->bio_iter = NULL;
+#endif
 
 	dout("prepare_write_message %p seq %lld type %d len %d+%d+%d %d pgs\n",
 	     m, con->out_seq, le16_to_cpu(m->hdr.type),