diff --git a/drivers/ethernet/eth_stm32_hal.c b/drivers/ethernet/eth_stm32_hal.c
index eb03f5cf343..34825a7a91c 100644
--- a/drivers/ethernet/eth_stm32_hal.c
+++ b/drivers/ethernet/eth_stm32_hal.c
@@ -56,13 +56,17 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME);
 
 #define PHY_ADDR	CONFIG_ETH_STM32_HAL_PHY_ADDRESS
 
-#if defined(CONFIG_SOC_SERIES_STM32H7X) || defined(CONFIG_SOC_SERIES_STM32H5X)
+#if defined(CONFIG_MDIO)
 
 #define DEVICE_PHY_BY_NAME(n) \
 	    DEVICE_DT_GET(DT_CHILD(DT_INST_CHILD(n, mdio), ethernet_phy_0))
 
 static const struct device *eth_stm32_phy_dev = DEVICE_PHY_BY_NAME(0);
 
+#endif
+
+#if defined(CONFIG_SOC_SERIES_STM32H7X) || defined(CONFIG_SOC_SERIES_STM32H5X)
+
 #define PHY_BSR  ((uint16_t)0x0001U)  /*!< Transceiver Basic Status Register */
 #define PHY_LINKED_STATUS  ((uint16_t)0x0004U)  /*!< Valid link established */