diff --git a/arch/arm/src/stm32h5/stm32_ethernet.c b/arch/arm/src/stm32h5/stm32_ethernet.c
index ff193f57b17..41a88fb221a 100644
--- a/arch/arm/src/stm32h5/stm32_ethernet.c
+++ b/arch/arm/src/stm32h5/stm32_ethernet.c
@@ -3604,9 +3604,10 @@ static inline void stm32_ethgpioconfig(struct stm32_ethmac_s *priv)
 #if defined(CONFIG_STM32H5_MII) || defined(CONFIG_STM32H5_RMII)
 
   /* MDC and MDIO are common to both modes */
-
+# ifndef CONFIG_STM32H5_NO_PHY
   stm32_configgpio(GPIO_ETH_MDC);
   stm32_configgpio(GPIO_ETH_MDIO);
+# endif
 
   /* Set up the MII interface */
 
diff --git a/arch/arm/src/stm32h7/stm32_ethernet.c b/arch/arm/src/stm32h7/stm32_ethernet.c
index 5b74a103285..476a5fb3eaa 100644
--- a/arch/arm/src/stm32h7/stm32_ethernet.c
+++ b/arch/arm/src/stm32h7/stm32_ethernet.c
@@ -3699,9 +3699,10 @@ static inline void stm32_ethgpioconfig(struct stm32_ethmac_s *priv)
 #if defined(CONFIG_STM32H7_MII) || defined(CONFIG_STM32H7_RMII)
 
   /* MDC and MDIO are common to both modes */
-
+# ifndef CONFIG_STM32H7_NO_PHY
   stm32_configgpio(GPIO_ETH_MDC);
   stm32_configgpio(GPIO_ETH_MDIO);
+# endif
 
   /* Set up the MII interface */