diff --git a/boards/st/disco_l475_iot1/arduino_r3_connector.dtsi b/boards/st/disco_l475_iot1/arduino_r3_connector.dtsi
index b48af67e2a1..05228c5ccb8 100644
--- a/boards/st/disco_l475_iot1/arduino_r3_connector.dtsi
+++ b/boards/st/disco_l475_iot1/arduino_r3_connector.dtsi
@@ -35,6 +35,6 @@
 	};
 };
 
-arduino_i2c: &i2c3 {};
+arduino_i2c: &i2c1 {};
 arduino_spi: &spi1 {};
 arduino_serial: &uart4 {};