diff --git a/Libraries/Image/Image.ios.js b/Libraries/Image/Image.ios.js
index 2b649bf9c..8eda0cc8c 100644
--- a/Libraries/Image/Image.ios.js
+++ b/Libraries/Image/Image.ios.js
@@ -102,6 +102,17 @@ var Image = React.createClass({
     /**
      * Determines how to resize the image when the frame doesn't match the raw
      * image dimensions.
+     *
+     * 'cover': Scale the image uniformly (maintain the image's aspect ratio)
+     * so that both dimensions (width and height) of the image will be equal
+     * to or larger than the corresponding dimension of the view (minus padding).
+     *
+     * 'contain': Scale the image uniformly (maintain the image's aspect ratio)
+     * so that both dimensions (width and height) of the image will be equal to
+     * or less than the corresponding dimension of the view (minus padding).
+     *
+     * 'stretch': Scale width and height independently, This may change the
+     * aspect ratio of the src.
      */
     resizeMode: PropTypes.oneOf(['cover', 'contain', 'stretch']),
     /**