diff --git a/lib/CSSGroupingRule.js b/lib/CSSGroupingRule.js
index 4555aba..077162d 100644
--- a/lib/CSSGroupingRule.js
+++ b/lib/CSSGroupingRule.js
@@ -65,4 +65,5 @@ CSSOM.CSSGroupingRule.prototype.constructor = CSSOM.CSSGroupingRule;
 
 //.CommonJS
 exports.CSSGroupingRule = CSSOM.CSSGroupingRule;
+CSSOM.parse = require('./parse').parse; // Cannot be included sooner due to the mutual dependency between parse.js and CSSStyleDeclaration.js
 ///CommonJS