diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 54c83224698..22d228913cf 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1405,9 +1405,6 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
 	return 0;
 }
 
-static int
-mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card);
-
 static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 {
 	int ret;