diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index f633c0bd52e4..a1deab6f1309 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -706,7 +706,7 @@ static void prepare_header95(struct p_header95 *h, enum drbd_packet cmd, int siz
 static void _prepare_header(struct drbd_tconn *tconn, int vnr, struct p_header *h,
 			    enum drbd_packet cmd, int size)
 {
-	if (tconn->agreed_pro_version >= 100 || size > DRBD_MAX_SIZE_H80_PACKET)
+	if (tconn->agreed_pro_version >= 95)
 		prepare_header95(&h->h95, cmd, size);
 	else
 		prepare_header80(&h->h80, cmd, size);
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 6a3e628b68c6..27d4a4520641 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -819,9 +819,9 @@ static int drbd_connect(struct drbd_tconn *tconn)
 		return -2;
 
 	clear_bit(DISCARD_CONCURRENT, &tconn->flags);
-	tconn->agreed_pro_version = 99;
-	/* agreed_pro_version must be smaller than 100 so we send the old
-	   header (h80) in the first packet and in the handshake packet. */
+
+	/* Assume that the peer only understands protocol 80 until we know better.  */
+	tconn->agreed_pro_version = 80;
 
 	sock  = NULL;
 	msock = NULL;