diff --git a/configs/stm32mp15_basic_defconfig b/configs/stm32mp15_basic_defconfig
index cdcf591c..e5d9e8b 100644
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -97,6 +97,7 @@
 # CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
 CONFIG_SPI_FLASH_MTD=y
 CONFIG_SPL_SPI_FLASH_MTD=y
+CONFIG_PHY_REALTEK=y
 CONFIG_DM_ETH=y
 CONFIG_DWC_ETH_QOS=y
 CONFIG_PHY=y
diff --git a/configs/stm32mp15_trusted_defconfig b/configs/stm32mp15_trusted_defconfig
index 695fca0..9e61b5d 100644
--- a/configs/stm32mp15_trusted_defconfig
+++ b/configs/stm32mp15_trusted_defconfig
@@ -83,6 +83,7 @@
 CONFIG_SPI_FLASH_WINBOND=y
 # CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
 CONFIG_SPI_FLASH_MTD=y
+CONFIG_PHY_REALTEK=y
 CONFIG_DM_ETH=y
 CONFIG_DWC_ETH_QOS=y
 CONFIG_PHY=y