diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index 2c4eabf2..66317a71 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -86,6 +86,14 @@
 		</properties>
 	</rule>
 
+	<!-- Verify that everything in the global namespace is prefixed with a theme specific prefix.
+		 Multiple valid prefixes can be provided as a comma-delimited list. -->
+	<rule ref="WordPress.NamingConventions.PrefixAllGlobals">
+		<properties>
+			<property name="prefixes" type="array" value="_s" />
+		</properties>
+	</rule>
+
 
 	<!--
 	#############################################################################
@@ -93,6 +101,7 @@
 	#############################################################################
 	-->
 
+
 	<config name="testVersion" value="5.2-99.0"/>
 	<rule ref="PHPCompatibility"/>
 </ruleset>