diff --git a/boards/slstk3402a/include/board.h b/boards/slstk3402a/include/board.h
index 53c5565ccb..5ebff1cb2d 100644
--- a/boards/slstk3402a/include/board.h
+++ b/boards/slstk3402a/include/board.h
@@ -93,9 +93,6 @@ extern "C" {
  * Connection to the on-board temperature/humidity sensor (Si7021).
  * @{
  */
-#ifndef SI7021_ENABLED
-#define SI7021_ENABLED          (1)
-#endif
 #define SI7021_I2C              I2C_DEV(0)
 #define SI7021_EN_PIN           GPIO_PIN(PB, 10)