diff --git a/configs/B4420QDS_defconfig b/configs/B4420QDS_defconfig
index 34a6219..8308b95 100644
--- a/configs/B4420QDS_defconfig
+++ b/configs/B4420QDS_defconfig
@@ -3,6 +3,7 @@
 CONFIG_TARGET_B4860QDS=y
 CONFIG_SYS_EXTRA_OPTIONS="PPC_B4420"
 CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_SST=y
 CONFIG_NETDEVICES=y
 CONFIG_E1000=y
 CONFIG_SYS_NS16550=y