diff --git a/data/etc/wearable_core_hardware.xml b/data/etc/wearable_core_hardware.xml
index ae0b4d4..4b7a706 100644
--- a/data/etc/wearable_core_hardware.xml
+++ b/data/etc/wearable_core_hardware.xml
@@ -22,7 +22,8 @@
 -->
 <permissions>
     <feature name="android.hardware.location" />
-    <feature name="android.hardware.sensor.compass" />
+    <!-- devices supporting compass/magnitometer sensor must include
+	 android.hardware.sensor.compass.xml -->
     <feature name="android.hardware.sensor.accelerometer" />
     <feature name="android.hardware.bluetooth" />
     <feature name="android.hardware.touchscreen" />