diff --git a/arduino/i2c_slave_with_sensor_reading b/arduino/i2c_slave_with_sensor_reading
index d9af2910..e07b494d 100644
--- a/arduino/i2c_slave_with_sensor_reading
+++ b/arduino/i2c_slave_with_sensor_reading
@@ -20,6 +20,7 @@ void setup()
   Serial.println("Setup for sensor");
 
   Wire.begin(I2C_ADDRESS_SELF);        // join i2c bus
+  Wire.setClock(400000); // set I2C clock for full speed
   Serial.begin(9600);  // start serial for output
   digitalWrite(A4, LOW); 
   digitalWrite(A5, LOW);