diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 45b1f430685fca915aa12c7f28913fa4ed6a0733..513eb09a638f305d93f28aa2bdbfe967f70c32fc 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -584,7 +584,7 @@ static int mmc_blk_probe(struct mmc_card *card)
 	if (err)
 		goto out;
 
-	string_get_size(get_capacity(md->disk) << 9, STRING_UNITS_2,
+	string_get_size((u64)get_capacity(md->disk) << 9, STRING_UNITS_2,
 			cap_str, sizeof(cap_str));
 	printk(KERN_INFO "%s: %s %s %s %s\n",
 		md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),