diff --git a/docs/src/pages/customization/css-in-js.md b/docs/src/pages/customization/css-in-js.md
index 9cee4a04dcf878..82fd4de27af106 100644
--- a/docs/src/pages/customization/css-in-js.md
+++ b/docs/src/pages/customization/css-in-js.md
@@ -30,7 +30,7 @@ The best place to start is by looking at the features each [plugin](http://cssin
 ## Sheet registry
 
 When rendering on the server, you will need to get all rendered styles as a CSS string.
-`SheetsRegistry` classs allows you to manually aggregate and stringify them.
+`SheetsRegistry` class allows you to manually aggregate and stringify them.
 Read more about [Server Rendering here](/guides/server-rendering).
 
 {{demo='pages/customization/JssRegistry.js'}}