diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index 88f1c41536..a9087b5bd9 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -288,7 +288,8 @@ function wp_default_scripts( &$scripts ) {
 
 	$scripts->add( 'comment-reply', "/wp-includes/js/comment-reply$suffix.js", array(), false, 1 );
 
-	$scripts->add( 'json2', "/wp-includes/js/json2$suffix.js", array(), '2011-02-23');
+	$scripts->add( 'json2', "/wp-includes/js/json2$suffix.js", array(), '2011-02-23' );
+	did_action( 'init' ) && $scripts->add_data( 'json2', 'conditional', 'lt IE 8' );
 
 	$scripts->add( 'underscore', "/wp-includes/js/underscore$dev_suffix.js", array(), '1.6.0', 1 );
 	$scripts->add( 'backbone', "/wp-includes/js/backbone$dev_suffix.js", array( 'underscore','jquery' ), '1.1.2', 1 );