diff --git a/drivers/mmc/at91_mci.c b/drivers/mmc/at91_mci.c
index e28850d..2ce50f3 100644
--- a/drivers/mmc/at91_mci.c
+++ b/drivers/mmc/at91_mci.c
@@ -824,6 +824,7 @@
 	mmc->caps = MMC_CAP_BYTEBLOCK;
 
 	mmc->max_blk_size = 4095;
+	mmc->max_blk_count = mmc->max_req_size;
 
 	host = mmc_priv(mmc);
 	host->mmc = mmc;