Index: drbd_main.c
===================================================================
--- drbd_main.c	(revision 3504)
+++ drbd_main.c	(working copy)
@@ -1506,7 +1506,7 @@
  * in big endian!
  */ 
 static int _drbd_send_ack(drbd_dev *mdev, Drbd_Packet_Cmd cmd, 
-			  sector_t sector,
+			  u64 sector,
 			  unsigned int blksize,
 			  u64 block_id)
 {