diff --git a/core/java/android/hardware/SensorEvent.java b/core/java/android/hardware/SensorEvent.java
index 51a17c1707f18..6166d2c2c2673 100644
--- a/core/java/android/hardware/SensorEvent.java
+++ b/core/java/android/hardware/SensorEvent.java
@@ -334,8 +334,8 @@ public class SensorEvent {
      * </p>
      * 
      * <p>
-     * values[2]: Roll, rotation around y-axis (-90 to 90), with positive values
-     * when the x-axis moves <b>toward</b> the z-axis.
+     * values[2]: Roll, rotation around the x-axis (-90 to 90)
+     * increasing as the device moves clockwise.
      * </p>
      * </ul>
      *