diff --git a/src/core.js b/src/core.js
index 53d69ca8..7bc0fb90 100644
--- a/src/core.js
+++ b/src/core.js
@@ -12,9 +12,6 @@ var jQuery = function( selector, context ) {
 	// Map over the $ in case of overwrite
 	_$ = window.$,
 
-	// Use the correct document accordingly with window argument (sandbox)
-	//document = window.document,
-
 	// A central reference to the root jQuery(document)
 	rootjQuery,
 
diff --git a/src/intro.js b/src/intro.js
index 433f8bc8..cb15705a 100644
--- a/src/intro.js
+++ b/src/intro.js
@@ -15,3 +15,5 @@
  */
 (function( window, undefined ) {
 
+// Use the correct document accordingly with window argument (sandbox)
+var document = window.document;