diff --git a/README.md b/README.md
index d536ad8..65cebb2 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,12 @@ This helper can accept `application/json` mime type in which case it will `JSON.
 
 Calls `event.preventDefault()`.
 
+To allow a drop, we must prevent the default handling of the element in `ondragover`.
+
+```hbs
+<div ondragover={{action (prevent-default)}} ondrop=...></div>
+```
+
 ## `(stop-propagating)
 
 Calls `event.stopPropagating()`.
@@ -65,4 +71,4 @@ For more information on using ember-cli, visit [http://ember-cli.com/](http://em
 
 ## Credits
 
-Thank you Miguel Camba for suggesting to try doing drag and drop with pure events.
\ No newline at end of file
+Thank you Miguel Camba for suggesting to try doing drag and drop with pure events.