diff --git a/docs/routing.md b/docs/routing.md
index c07e1b81..4dbccadf 100644
--- a/docs/routing.md
+++ b/docs/routing.md
@@ -19,7 +19,7 @@ async def person_handler(request, integer_arg):
 
 @app.route('/number/<number_arg:number>')
 async def person_handler(request, number_arg):
-	return text('Number - {}'.format(number))
+	return text('Number - {}'.format(number_arg))
 
 @app.route('/person/<name:[A-z]>')
 async def person_handler(request, name):