diff --git a/src/Umbraco.Web.UI.Client/src/views/stylesheets/infiniteeditors/richtextrule/richtextrule.html b/src/Umbraco.Web.UI.Client/src/views/stylesheets/infiniteeditors/richtextrule/richtextrule.html
index 5ff3d90588..cc5487d747 100644
--- a/src/Umbraco.Web.UI.Client/src/views/stylesheets/infiniteeditors/richtextrule/richtextrule.html
+++ b/src/Umbraco.Web.UI.Client/src/views/stylesheets/infiniteeditors/richtextrule/richtextrule.html
@@ -27,7 +27,7 @@
                         </umb-control-group>
 
                         <umb-control-group label="@stylesheet_styles" description="@stylesheet_stylesHelp">
-                            <textarea class="umb-stylesheet-rule-styles" ng-model="model.rule.styles" required></textarea>
+                            <textarea class="umb-stylesheet-rule-styles" ng-model="model.rule.styles" ng-required="model.rule.selector.charAt(0) === '.' || model.rule.selector.charAt(0) === '#' "></textarea>
                         </umb-control-group>
 
                         <umb-control-group label="@stylesheet_preview" description="@stylesheet_previewHelp">