diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index c75e45ec..5a4ab66b 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -16,8 +16,8 @@
 	-->
 	<arg value="psvn"/>
 
-	<!-- Only check the PHP files. JS files are checked separately with JSCS and JSHint. -->
-	<arg name="extensions" value="php"/>
+	<!-- Only check the PHP, CSS and SCSS files. JS files are checked separately with JSCS and JSHint. -->
+	<arg name="extensions" value="php,css,scss/css"/>
 
 	<!-- Check all files in this directory and the directories below it. -->
 	<file>.</file>