diff --git a/configs/B4860QDS_SECURE_BOOT_defconfig b/configs/B4860QDS_SECURE_BOOT_defconfig
index 26ad411..e376a19 100644
--- a/configs/B4860QDS_SECURE_BOOT_defconfig
+++ b/configs/B4860QDS_SECURE_BOOT_defconfig
@@ -30,6 +30,8 @@
 CONFIG_SYS_FLASH_USE_BUFFER_WRITE=y
 CONFIG_SYS_FLASH_CFI=y
 CONFIG_SPI_FLASH=y
+CONFIG_SF_DEFAULT_MODE=0
+CONFIG_SF_DEFAULT_SPEED=10000000
 CONFIG_SPI_FLASH_SST=y
 CONFIG_PHYLIB=y
 CONFIG_PHY_GIGE=y