diff --git a/libs/core/input.cpp b/libs/core/input.cpp
index dab713c4..80a6f526 100644
--- a/libs/core/input.cpp
+++ b/libs/core/input.cpp
@@ -74,13 +74,13 @@ enum class Gesture {
     //% jres=gestures.tiltbackwards
     LogoDown = MICROBIT_ACCELEROMETER_EVT_TILT_DOWN,
     /**
-     * Raised when the screen is pointing down and the board is horizontal
+     * Raised when the screen is pointing up and the board is horizontal
      */
     //% block="screen up"
     //% jres=gestures.frontsideup
     ScreenUp = MICROBIT_ACCELEROMETER_EVT_FACE_UP,
     /**
-     * Raised when the screen is pointing up and the board is horizontal
+     * Raised when the screen is pointing down and the board is horizontal
      */
     //% block="screen down"
     //% jres=gestures.backsideup