diff --git a/src/ShadowCSS.js b/src/ShadowCSS.js
index fd8425d..a8dbfee 100644
--- a/src/ShadowCSS.js
+++ b/src/ShadowCSS.js
@@ -441,7 +441,7 @@ var ShadowCSS = {
         cssText += this.propertiesFromRule(rule) + '\n}\n\n';
       } else if (rule.media) {
         cssText += '@media ' + rule.media.mediaText + ' {\n';
-        cssText += this.scopeRules(rule.cssRules, name);
+        cssText += this.scopeRules(rule.cssRules, name, typeExtension);
         cssText += '\n}\n\n';
       } else if (rule.cssText) {
         cssText += rule.cssText + '\n\n';