diff --git a/docs/10.4-test-utils.md b/docs/10.4-test-utils.md
index c7cb9739..e0e503ae 100644
--- a/docs/10.4-test-utils.md
+++ b/docs/10.4-test-utils.md
@@ -30,7 +30,7 @@ React.addons.TestUtils.Simulate.keyDown(node, {key: "Enter"});
 ### renderIntoDocument
 
 ```javascript
-ReactComponent renderIntoDocument(ReactComponent instance)
+ReactComponent renderIntoDocument(ReactElement instance)
 ```
 
 Render a component into a detached DOM node in the document. **This function requires a DOM.**