diff --git a/src/ajax/xhr.js b/src/ajax/xhr.js
index 927fb88d0..fe24b6751 100644
--- a/src/ajax/xhr.js
+++ b/src/ajax/xhr.js
@@ -6,13 +6,9 @@ define([
 
 // Create the request object
 // (This is still attached to ajaxSettings for backward compatibility)
-jQuery.ajaxSettings.xhr = window.ActiveXObject ?
-	/* Microsoft failed to properly
-	 * implement the XMLHttpRequest in IE7 (can't request local files),
-	 * so we use the ActiveXObject when it is available
-	 * Additionally XMLHttpRequest can be disabled in IE7/IE8 so
-	 * we need a fallback.
-	 */
+jQuery.ajaxSettings.xhr = window.ActiveXObject !== undefined ?
+	// Support: IE6+
+	// XHR cannot access local files, always use ActiveX for that case
 	function() {
 		return !this.isLocal && createStandardXHR() || createActiveXHR();
 	} :