diff --git a/media/java/android/media/FaceDetector.java b/media/java/android/media/FaceDetector.java
index 3b41cf806c8d8..cf900cece4c3c 100644
--- a/media/java/android/media/FaceDetector.java
+++ b/media/java/android/media/FaceDetector.java
@@ -102,6 +102,7 @@ public class FaceDetector {
      * Creates a FaceDetector, configured with the size of the images to
      * be analysed and the maximum number of faces that can be detected.
      * These parameters cannot be changed once the object is constructed.
+     * Note that the width of the image must be even.
      * 
      * @param width  the width of the image
      * @param height the height of the image