diff --git a/lib/ace/config.js b/lib/ace/config.js
index 1a60fbde..f4e4c89a 100644
--- a/lib/ace/config.js
+++ b/lib/ace/config.js
@@ -153,7 +153,8 @@ function init(packaged) {
     var scriptOptions = {};
     var scriptUrl = "";
 
-    var currentScript = (document.currentScript || document._currentScript );
+    // Use currentScript.ownerDocument in case this file was loaded from imported document. (HTML Imports)
+    var currentScript = (document.currentScript || document._currentScript ); // native or polyfill
     var currentDocument = currentScript && currentScript.ownerDocument || document;
     
     var scripts = currentDocument.getElementsByTagName("script");