diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index bdd7894..b8039cd 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -486,7 +486,7 @@
 	char cardtype;
 	int err;
 
-	mmc->card_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
+	mmc->card_caps = 0;
 
 	if (mmc_host_is_spi(mmc))
 		return 0;
@@ -495,6 +495,8 @@
 	if (mmc->version < MMC_VERSION_4)
 		return 0;
 
+	mmc->card_caps |= MMC_MODE_4BIT | MMC_MODE_8BIT;
+
 	err = mmc_send_ext_csd(mmc, ext_csd);
 
 	if (err)
@@ -1349,7 +1351,8 @@
 			mmc->tran_speed = 50000000;
 		else
 			mmc->tran_speed = 25000000;
-	} else {
+	} else if (mmc->version >= MMC_VERSION_4) {
+		/* Only version 4 of MMC supports wider bus widths */
 		int idx;
 
 		/* An array of possible bus widths in order of preference */