diff --git a/src/ajax/script.js b/src/ajax/script.js
index 1d372872b..d6094f520 100644
--- a/src/ajax/script.js
+++ b/src/ajax/script.js
@@ -54,6 +54,8 @@ jQuery.ajaxTransport( "script", function( s ) {
 
 				script = document.createElement( "script" );
 
+				script.async = true;
+
 				if ( s.scriptCharset ) {
 					script.charset = s.scriptCharset;
 				}