diff --git a/wp-includes/widgets.php b/wp-includes/widgets.php
index 4c6d4f448..60cfa2f3e 100644
--- a/wp-includes/widgets.php
+++ b/wp-includes/widgets.php
@@ -854,6 +854,8 @@ function dynamic_sidebar($index = 1) {
 	}
 
 	$sidebars_widgets = wp_get_sidebars_widgets();
+	if ( empty( $sidebars_widgets ) )
+		return false;
 
 	if ( empty($wp_registered_sidebars[$index]) || !array_key_exists($index, $sidebars_widgets) || !is_array($sidebars_widgets[$index]) || empty($sidebars_widgets[$index]) )
 		return false;