diff --git a/iron-image.html b/iron-image.html
index da3df07..ed9b135 100644
--- a/iron-image.html
+++ b/iron-image.html
@@ -21,7 +21,7 @@
 The `preload` option prevents the browser from rendering the image until the
 image is fully loaded.  In the interim, either the element's CSS `background-color`
 can be be used as the placeholder, or the `placeholder` property can be
-set to a URL (preferably a data-URI, for instant rendering) for an
+set to a URL (preferably a data-URI, for instant rendering) for a
 placeholder image.
 
 The `fade` option (only valid when `preload` is set) will cause the placeholder