diff --git a/connectivity/drivers/emac/TARGET_STM/TARGET_STM32F7/stm32f7_eth_conf.c b/connectivity/drivers/emac/TARGET_STM/TARGET_STM32F7/stm32f7_eth_conf.c
index 98655d74b8..ade0404c4c 100644
--- a/connectivity/drivers/emac/TARGET_STM/TARGET_STM32F7/stm32f7_eth_conf.c
+++ b/connectivity/drivers/emac/TARGET_STM/TARGET_STM32F7/stm32f7_eth_conf.c
@@ -17,6 +17,8 @@
 
 #include "stm32f7xx_hal.h"
 
+#if defined ETH
+
 void _eth_config_mac(ETH_HandleTypeDef *heth)
 {
     ETH_MACInitTypeDef macconf = {
@@ -59,3 +61,5 @@ void _eth_config_mac(ETH_HandleTypeDef *heth)
 
     (void) HAL_ETH_ConfigMAC(heth, &macconf);
 }
+
+#endif // defined ETH