diff --git a/boards/sodaq-explorer/include/periph_conf.h b/boards/sodaq-explorer/include/periph_conf.h
index 563e45c959..2cbe5761d0 100644
--- a/boards/sodaq-explorer/include/periph_conf.h
+++ b/boards/sodaq-explorer/include/periph_conf.h
@@ -200,8 +200,8 @@ static const i2c_conf_t i2c_config[] = {
     {
         .dev      = &(SERCOM1->I2CM),
         .speed    = I2C_SPEED_NORMAL,
-        .sda_pin  = GPIO_PIN(PA, 16),
         .scl_pin  = GPIO_PIN(PA, 17),
+        .sda_pin  = GPIO_PIN(PA, 16),
         .mux      = GPIO_MUX_C,
         .gclk_src = GCLK_CLKCTRL_GEN_GCLK0,
         .flags    = I2C_FLAG_NONE,
@@ -209,8 +209,8 @@ static const i2c_conf_t i2c_config[] = {
     {
         .dev      = &(SERCOM2->I2CM),
         .speed    = I2C_SPEED_NORMAL,
-        .sda_pin  = GPIO_PIN(PA, 8),
         .scl_pin  = GPIO_PIN(PA, 9),
+        .sda_pin  = GPIO_PIN(PA, 8),
         .mux      = GPIO_MUX_C,
         .gclk_src = GCLK_CLKCTRL_GEN_GCLK0,
         .flags    = I2C_FLAG_NONE