diff --git a/drivers/pinmux/stm32/pinmux_board_carbon.c b/drivers/pinmux/stm32/pinmux_board_carbon.c
index 29a087221fa..6282c882d58 100644
--- a/drivers/pinmux/stm32/pinmux_board_carbon.c
+++ b/drivers/pinmux/stm32/pinmux_board_carbon.c
@@ -23,6 +23,14 @@ static const struct pin_config pinconf[] = {
 	{STM32_PIN_PA2, STM32F4_PINMUX_FUNC_PA2_USART2_TX},
 	{STM32_PIN_PA3, STM32F4_PINMUX_FUNC_PA3_USART2_RX},
 #endif	/* CONFIG_UART_STM32_PORT_2 */
+#ifdef CONFIG_I2C_1
+	{STM32_PIN_PB6, STM32F4_PINMUX_FUNC_PB6_I2C1_SCL},
+	{STM32_PIN_PB7, STM32F4_PINMUX_FUNC_PB7_I2C1_SDA},
+#endif /* CONFIG_I2C_1 */
+#ifdef CONFIG_I2C_2
+	{STM32_PIN_PB10, STM32F4_PINMUX_FUNC_PB10_I2C2_SCL},
+	{STM32_PIN_PB3, STM32F4_PINMUX_FUNC_PB3_I2C2_SDA},
+#endif /* CONFIG_I2C_2 */
 };
 
 static int pinmux_stm32_init(struct device *port)
diff --git a/drivers/pinmux/stm32/pinmux_board_nucleo_f334r8.c b/drivers/pinmux/stm32/pinmux_board_nucleo_f334r8.c
index 59feda59dcf..3f3fd0f9a01 100644
--- a/drivers/pinmux/stm32/pinmux_board_nucleo_f334r8.c
+++ b/drivers/pinmux/stm32/pinmux_board_nucleo_f334r8.c
@@ -19,6 +19,10 @@ static const struct pin_config pinconf[] = {
 	{STM32_PIN_PA9,  STM32F3_PINMUX_FUNC_PA9_USART1_TX},
 	{STM32_PIN_PA10, STM32F3_PINMUX_FUNC_PA10_USART1_RX},
 #endif	/* CONFIG_UART_STM32_PORT_1 */
+#ifdef CONFIG_I2C_1
+	{STM32_PIN_PB8, STM32F3_PINMUX_FUNC_PB8_I2C1_SCL},
+	{STM32_PIN_PB9, STM32F3_PINMUX_FUNC_PB9_I2C1_SDA},
+#endif /* CONFIG_I2C_1 */
 #ifdef CONFIG_UART_STM32_PORT_2
 	{STM32_PIN_PA2, STM32F3_PINMUX_FUNC_PA2_USART2_TX},
 	{STM32_PIN_PA3, STM32F3_PINMUX_FUNC_PA3_USART2_RX},
diff --git a/drivers/pinmux/stm32/pinmux_board_nucleo_f401re.c b/drivers/pinmux/stm32/pinmux_board_nucleo_f401re.c
index 9314bf7b78f..d6792a23c66 100644
--- a/drivers/pinmux/stm32/pinmux_board_nucleo_f401re.c
+++ b/drivers/pinmux/stm32/pinmux_board_nucleo_f401re.c
@@ -26,6 +26,10 @@ static const struct pin_config pinconf[] = {
 #ifdef CONFIG_PWM_STM32_2
 	{STM32_PIN_PA0, STM32F4_PINMUX_FUNC_PA0_PWM2_CH1},
 #endif /* CONFIG_PWM_STM32_2 */
+#ifdef CONFIG_I2C_1
+	{STM32_PIN_PB8, STM32F4_PINMUX_FUNC_PB8_I2C1_SCL},
+	{STM32_PIN_PB9, STM32F4_PINMUX_FUNC_PB9_I2C1_SDA},
+#endif
 };
 
 static int pinmux_stm32_init(struct device *port)
diff --git a/drivers/pinmux/stm32/pinmux_board_olimexino_stm32.c b/drivers/pinmux/stm32/pinmux_board_olimexino_stm32.c
index 423ffc9b271..5191fbb333b 100644
--- a/drivers/pinmux/stm32/pinmux_board_olimexino_stm32.c
+++ b/drivers/pinmux/stm32/pinmux_board_olimexino_stm32.c
@@ -27,6 +27,10 @@ static const struct pin_config pinconf[] = {
 	{STM32_PIN_PB10, STM32F1_PINMUX_FUNC_PB10_USART3_TX},
 	{STM32_PIN_PB11, STM32F1_PINMUX_FUNC_PB11_USART3_RX},
 #endif	/* CONFIG_UART_STM32_PORT_3 */
+#ifdef CONFIG_I2C_2
+	{STM32_PIN_PB10, STM32F1_PINMUX_FUNC_PB10_I2C2_SCL},
+	{STM32_PIN_PB11, STM32F1_PINMUX_FUNC_PB11_I2C2_SDA},
+#endif /* CONFIG_I2C_2 */
 };
 
 static int pinmux_stm32_init(struct device *port)