diff --git a/include/mmc.h b/include/mmc.h
index 20481b0ace..40ed3bc01a 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -217,6 +217,7 @@ static inline bool mmc_is_tuning_cmd(uint cmdidx)
 #define EXT_CSD_WR_REL_PARAM		166	/* R */
 #define EXT_CSD_WR_REL_SET		167	/* R/W */
 #define EXT_CSD_RPMB_MULT		168	/* RO */
+#define EXT_CSD_BOOT_WP			173	/* R/W & R/W/C_P */
 #define EXT_CSD_ERASE_GROUP_DEF		175	/* R/W */
 #define EXT_CSD_BOOT_BUS_WIDTH		177
 #define EXT_CSD_PART_CONF		179	/* R/W */
@@ -328,6 +329,8 @@ static inline bool mmc_is_tuning_cmd(uint cmdidx)
 #define MMC_QUIRK_RETRY_SEND_CID	BIT(0)
 #define MMC_QUIRK_RETRY_SET_BLOCKLEN	BIT(1)
 
+#define BOOT1_PWR_WP	(0x83)
+
 enum mmc_voltage {
 	MMC_SIGNAL_VOLTAGE_000 = 0,
 	MMC_SIGNAL_VOLTAGE_120 = 1,
@@ -339,6 +342,7 @@ enum mmc_voltage {
 				MMC_SIGNAL_VOLTAGE_180 |\
 				MMC_SIGNAL_VOLTAGE_330)
 
+
 /* Maximum block size for MMC */
 #define MMC_MAX_BLOCK_LEN	512
 
diff --git a/lib/avb/fsl/fsl_avb_ab_flow.c b/lib/avb/fsl/fsl_avb_ab_flow.c
index 35fad53f7f..8a67de79eb 100644
--- a/lib/avb/fsl/fsl_avb_ab_flow.c
+++ b/lib/avb/fsl/fsl_avb_ab_flow.c
@@ -62,6 +62,8 @@ bool fsl_slot_is_bootable(AvbABSlotData* slot) {
 #define PARTITION_MISC "misc"
 #define PARTITION_BOOTLOADER "bootloader"
 
+extern int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value);
+
 /* Pre-declaration of h_spl_load_read(), see detail implementation in
  * common/spl/spl_mmc.c.
  */
@@ -281,6 +283,11 @@ int mmc_load_image_raw_sector_dual_uboot(
 			return -1;
 		}
 	}
+	/* Set power-on write protection to boot1 partition. */
+	if (mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP, BOOT1_PWR_WP)) {
+		printf("Unable to set power-on write protection to boot1!\n");
+		return -1;
+	}
 
 	/* Load AB metadata from misc partition */
 	if (fsl_load_metadata_dual_uboot(dev_desc, &ab_data,