diff --git a/boards/nucleo-f722ze/include/periph_conf.h b/boards/nucleo-f722ze/include/periph_conf.h
index d932e50e96..0535821b6f 100644
--- a/boards/nucleo-f722ze/include/periph_conf.h
+++ b/boards/nucleo-f722ze/include/periph_conf.h
@@ -22,6 +22,7 @@
 #define PERIPH_CONF_H
 
 #include "periph_cpu.h"
+#include "cfg_i2c1_pb8_pb9.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -136,29 +137,6 @@ static const uart_conf_t uart_config[] = {
 #define UART_NUMOF          (sizeof(uart_config) / sizeof(uart_config[0]))
 /** @} */
 
-/**
- * @name I2C configuration
- * @{
- */
-static const i2c_conf_t i2c_config[] = {
-    {
-        .dev            = I2C1,
-        .speed          = I2C_SPEED_NORMAL,
-        .scl_pin        = GPIO_PIN(PORT_B, 8),
-        .sda_pin        = GPIO_PIN(PORT_B, 9),
-        .scl_af         = GPIO_AF4,
-        .sda_af         = GPIO_AF4,
-        .bus            = APB1,
-        .rcc_mask       = RCC_APB1ENR_I2C1EN,
-        .irqn           = I2C1_ER_IRQn,
-    }
-};
-
-#define I2C_0_ISR           isr_i2c1_er
-
-#define I2C_NUMOF           (sizeof(i2c_config) / sizeof(i2c_config[0]))
-/** @} */
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/boards/nucleo-l476rg/include/periph_conf.h b/boards/nucleo-l476rg/include/periph_conf.h
index 6ad36e0adf..33130f0b91 100644
--- a/boards/nucleo-l476rg/include/periph_conf.h
+++ b/boards/nucleo-l476rg/include/periph_conf.h
@@ -26,6 +26,7 @@
 #define PERIPH_CONF_H
 
 #include "periph_cpu.h"
+#include "cfg_i2c1_pb8_pb9.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -249,29 +250,6 @@ static const spi_conf_t spi_config[] = {
 #define SPI_NUMOF           (sizeof(spi_config) / sizeof(spi_config[0]))
 /** @} */
 
-/**
- * @name I2C configuration
- * @{
- */
-static const i2c_conf_t i2c_config[] = {
-    {
-        .dev            = I2C1,
-        .speed          = I2C_SPEED_NORMAL,
-        .scl_pin        = GPIO_PIN(PORT_B, 8),
-        .sda_pin        = GPIO_PIN(PORT_B, 9),
-        .scl_af         = GPIO_AF4,
-        .sda_af         = GPIO_AF4,
-        .bus            = APB1,
-        .rcc_mask       = RCC_APB1ENR1_I2C1EN,
-        .irqn           = I2C1_ER_IRQn,
-    }
-};
-
-#define I2C_0_ISR           isr_i2c1_er
-
-#define I2C_NUMOF           (sizeof(i2c_config) / sizeof(i2c_config[0]))
-/** @} */
-
 /**
  * @name    ADC configuration
  *