diff --git a/drivers/pinmux/stm32/pinmux_stm32f4.h b/drivers/pinmux/stm32/pinmux_stm32f4.h
index 1117b4283c..66f87a6f08 100644
--- a/drivers/pinmux/stm32/pinmux_stm32f4.h
+++ b/drivers/pinmux/stm32/pinmux_stm32f4.h
@@ -247,10 +247,6 @@
 	(STM32_PINMUX_ALT_FUNC_11 | STM32_PUSHPULL_NOPULL | \
 	 STM32_OSPEEDR_VERY_HIGH_SPEED)
 
-#define STM32F4_PINMUX_FUNC_PC4_ETH			    \
-	(STM32_PINMUX_ALT_FUNC_11 | STM32_PUSHPULL_NOPULL | \
-	 STM32_OSPEEDR_VERY_HIGH_SPEED)
-
 #define STM32F4_PINMUX_FUNC_PC5_USART3_RX   \
 	(STM32_PINMUX_ALT_FUNC_7 | STM32_PUSHPULL_NOPULL)
 #define STM32F4_PINMUX_FUNC_PC5_ETH         \