diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 92b24d083956..47771ab82579 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1299,10 +1299,10 @@ int drbd_send_ack(struct drbd_conf *mdev, enum drbd_packet cmd,
 int drbd_send_ack_ex(struct drbd_conf *mdev, enum drbd_packet cmd,
 		     sector_t sector, int blksize, u64 block_id)
 {
-	return !_drbd_send_ack(mdev, cmd,
-			       cpu_to_be64(sector),
-			       cpu_to_be32(blksize),
-			       cpu_to_be64(block_id));
+	return _drbd_send_ack(mdev, cmd,
+			      cpu_to_be64(sector),
+			      cpu_to_be32(blksize),
+			      cpu_to_be64(block_id));
 }
 
 int drbd_send_drequest(struct drbd_conf *mdev, int cmd,
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 69db6de984c0..9b740864b51c 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -1163,8 +1163,8 @@ int w_e_end_ov_reply(struct drbd_work *w, int cancel)
 	else
 		ov_oos_print(mdev);
 
-	ok = drbd_send_ack_ex(mdev, P_OV_RESULT, sector, size,
-			      eq ? ID_IN_SYNC : ID_OUT_OF_SYNC);
+	ok = !drbd_send_ack_ex(mdev, P_OV_RESULT, sector, size,
+			       eq ? ID_IN_SYNC : ID_OUT_OF_SYNC);
 
 	dec_unacked(mdev);