diff --git a/board/bsh/imx8mn_smm_s2/spl.c b/board/bsh/imx8mn_smm_s2/spl.c
index 0f61acc630..097b60c055 100644
--- a/board/bsh/imx8mn_smm_s2/spl.c
+++ b/board/bsh/imx8mn_smm_s2/spl.c
@@ -18,6 +18,9 @@
 
 int spl_board_boot_device(enum boot_device boot_dev_spl)
 {
+	if (IS_ENABLED(CONFIG_NAND_MXS) && get_boot_device() != USB_BOOT)
+		return BOOT_DEVICE_NAND;
+
 	return BOOT_DEVICE_BOOTROM;
 }