diff --git a/‎src/lib/style-properties.html‎
Lines changed: 3 additions & 3 deletions b/‎src/lib/style-properties.html‎
Lines changed: 3 additions & 3 deletions
@@ -285,11 +285,11 @@
         return {properties: props, key: o};
       },
 
-      _rootSelector: /(?:^:root)|(?::host\s*>\s*\*)/,
+      _rootSelector: /:root|:host\s*>\s*\*/,
 
       _checkRoot: function(hostScope, selector) {
         return Boolean(selector.match(this._rootSelector)) ||
-          (hostScope === 'html' && selector.indexOf('html') === 0);
+          (hostScope === 'html' && selector.indexOf('html') > -1);
       },
 
       whenHostOrRootRule: function(scope, rule, style, callback) {
@@ -311,7 +311,7 @@
         var cssBuild = scope.__cssBuild || style.__cssBuild;
         if (cssBuild === 'shady') {
           // :root -> x-foo > *.x-foo for elements and html for custom-style
-          isRoot = parsedSelector === (hostScope + ' > *.' + hostScope) || parsedSelector.indexOf('html') !== -1;
+          isRoot = parsedSelector === (hostScope + ' > *.' + hostScope) || parsedSelector.indexOf('html') > -1;
           // :host -> x-foo for elements, but sub-rules have .x-foo in them
           isHost = !isRoot && parsedSelector.indexOf(hostScope) === 0;
         }