diff --git a/core/html/ImageData.idl b/core/html/ImageData.idl
index f6274b4..44f6977 100644
--- a/core/html/ImageData.idl
+++ b/core/html/ImageData.idl
@@ -40,5 +40,6 @@
     readonly attribute long width;
     readonly attribute long height;
     // TODO(philipj): Expose data.
-    // readonly attribute Uint8ClampedArray data;
+    // FIXMEDART: Uncomment - we need this property.
+    readonly attribute Uint8ClampedArray data;
 };