diff --git a/docs/en/howto/extend-cms-interface.md b/docs/en/howto/extend-cms-interface.md
index 74d80f04a..76768fa34 100644
--- a/docs/en/howto/extend-cms-interface.md
+++ b/docs/en/howto/extend-cms-interface.md
@@ -60,7 +60,7 @@ Load the new CSS file into the CMS, by setting the `LeftAndMain.extra_requiremen
 	:::yml
 	LeftAndMain:
 	  extra_requirements_css:
-	    - mysite/css/BookmarkedPages.css:
+	    - mysite/css/BookmarkedPages.css
 
 ## Create a "bookmark" flag on pages ##