diff --git a/wp-admin/includes/widgets.php b/wp-admin/includes/widgets.php
index 7a9058de57..c9ca05fb28 100644
--- a/wp-admin/includes/widgets.php
+++ b/wp-admin/includes/widgets.php
@@ -41,7 +41,8 @@ function wp_list_widgets( $show = 'all', $_search = false ) {
 					continue;
 			}
 
-			$sidebar = is_active_widget( $widget['callback'] );
+			$sidebar = is_active_widget( $widget['callback'], $widget['id'] );
+
 			if ( ( 'unused' == $show && $sidebar ) || ( 'used' == $show && !$sidebar ) )
 				continue;
 
@@ -50,8 +51,9 @@ function wp_list_widgets( $show = 'all', $_search = false ) {
 			$widget_control_template = ob_get_contents();
 			ob_end_clean();
 
-			if ( !$sidebar || false !== strpos( $widget_control_template, '%i%' ) ) {
-				$already_shown[] = $widget['callback']; // it's a multi-widget.  We only need to show it in the list once.
+			if ( !$sidebar || $is_multi = false !== strpos( $widget_control_template, '%i%' ) ) {
+				if ( $is_multi )
+					$already_shown[] = $widget['callback']; // it's a multi-widget.  We only need to show it in the list once.
 				$action = 'add';
 				$add_url = wp_nonce_url( add_query_arg( array(
 					'sidebar' => $sidebar,
diff --git a/wp-includes/widgets.php b/wp-includes/widgets.php
index e138a5e6fe..1c29251df0 100644
--- a/wp-includes/widgets.php
+++ b/wp-includes/widgets.php
@@ -252,7 +252,7 @@ function dynamic_sidebar($index = 1) {
 
 /* @return mixed false if widget is not active or id of sidebar in which the widget is active
  */
-function is_active_widget($callback) {
+function is_active_widget($callback, $widget_id = false) {
 	global $wp_registered_widgets;
 
 	$sidebars_widgets = wp_get_sidebars_widgets(false);
@@ -260,7 +260,9 @@ function is_active_widget($callback) {
 	if ( is_array($sidebars_widgets) ) foreach ( $sidebars_widgets as $sidebar => $widgets )
 		if ( is_array($widgets) ) foreach ( $widgets as $widget )
 			if ( isset($wp_registered_widgets[$widget]['callback']) && $wp_registered_widgets[$widget]['callback'] == $callback )
-				return $sidebar;
+				if ( !$widget_id || $widget_id == $wp_registered_widgets[$widget]['id'] )
+					return $sidebar;
+				
 
 	return false;
 }