diff --git a/src/soc/ti/am335x/mmc.c b/src/soc/ti/am335x/mmc.c
index 395cf4f..b7b4f97 100644
--- a/src/soc/ti/am335x/mmc.c
+++ b/src/soc/ti/am335x/mmc.c
@@ -260,7 +260,7 @@
 	int err = 0;
 
 	struct sd_mmc_ctrlr *mmc_ctrlr = &mmc_host->sd_mmc_ctrlr;
-	memset(mmc_ctrlr, 0, sizeof(mmc_ctrlr));
+	memset(mmc_ctrlr, 0, sizeof(*mmc_ctrlr));
 
 
 	err = am335x_mmc_init(mmc_host->reg);