diff --git a/docs/tutorial.md b/docs/tutorial.md
index 5fbead4a..897da919 100644
--- a/docs/tutorial.md
+++ b/docs/tutorial.md
@@ -87,6 +87,8 @@ React.render(
 );
 ```
 
+Note that native HTML element names start with a lowercase letter, while custom React classes names begin with an uppercase letter.
+
 #### JSX Syntax
 
 The first thing you'll notice is the XML-ish syntax in your JavaScript. We have a simple precompiler that translates the syntactic sugar to this plain JavaScript: