diff --git a/configs/stm32f746-disco_defconfig b/configs/stm32f746-disco_defconfig
index c9e2256..cdfa8bb 100644
--- a/configs/stm32f746-disco_defconfig
+++ b/configs/stm32f746-disco_defconfig
@@ -46,6 +46,7 @@
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_PHY_SMSC=y
 CONFIG_DM_ETH=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_MII=y