diff --git a/functions.php b/functions.php
index 66d677afb..649f47823 100644
--- a/functions.php
+++ b/functions.php
@@ -211,7 +211,7 @@ add_action( 'widgets_init', 'twentytwelve_widgets_init' );
 function twentytwelve_homepage_sidebar_class() {
 	$classes = array( 'widget-area' );
 
-	if ( is_active_sidebar( 2 ) && is_active_sidebar( 3 ) )
+	if ( is_active_sidebar( 'sidebar-2' ) && is_active_sidebar( 'sidebar-3' ) )
 		$classes[] = 'two';
 
 	echo 'class="' . implode( ' ', $classes ) . '"';
@@ -362,7 +362,7 @@ endif;
 function twentytwelve_body_class( $classes ) {
 	$background_color = get_background_color();
 
-	if ( ! is_active_sidebar( 1 ) || is_page_template( 'page-templates/full-width.php' ) )
+	if ( ! is_active_sidebar( 'sidebar-1' ) || is_page_template( 'page-templates/full-width.php' ) )
 		$classes[] = 'full-width';
 
 	if ( is_page_template( 'page-templates/home.php' ) ) {
@@ -387,7 +387,7 @@ add_filter( 'body_class', 'twentytwelve_body_class' );
  * @since Twenty Twelve 1.0
  */
 function twentytwelve_content_width() {
-	if ( is_page_template( 'page-templates/full-width.php' ) || is_attachment() || ! is_active_sidebar( 1 ) ) {
+	if ( is_page_template( 'page-templates/full-width.php' ) || is_attachment() || ! is_active_sidebar( 'sidebar-1' ) ) {
 		global $content_width;
 		$content_width = 960;
 	}
diff --git a/sidebar-home.php b/sidebar-home.php
index 4629c9c2a..56aad5d0a 100644
--- a/sidebar-home.php
+++ b/sidebar-home.php
@@ -15,21 +15,21 @@
  *
  * If none of the sidebars have widgets, then let's bail early.
  */
-if ( ! is_active_sidebar( 2 ) && ! is_active_sidebar( 3 ) )
+if ( ! is_active_sidebar( 'sidebar-2' ) && ! is_active_sidebar( 'sidebar-3' ) )
 	return;
 
 // If we get this far, we have widgets. Let do this.
 ?>
 <div id="secondary" <?php twentytwelve_homepage_sidebar_class(); ?> role="complementary">
-	<?php if ( is_active_sidebar( 2 ) ) : ?>
+	<?php if ( is_active_sidebar( 'sidebar-2' ) ) : ?>
 	<div class="first home-widgets">
-		<?php dynamic_sidebar( 2 ); ?>
+		<?php dynamic_sidebar( 'sidebar-2' ); ?>
 	</div><!-- .first -->
 	<?php endif; ?>
 
-	<?php if ( is_active_sidebar( 3 ) ) : ?>
+	<?php if ( is_active_sidebar( 'sidebar-3' ) ) : ?>
 	<div class="second home-widgets">
-		<?php dynamic_sidebar( 3 ); ?>
+		<?php dynamic_sidebar( 'sidebar-3' ); ?>
 	</div><!-- .second -->
 	<?php endif; ?>
 </div><!-- #secondary -->
\ No newline at end of file
diff --git a/sidebar.php b/sidebar.php
index 151fbc44f..2bc4969ae 100644
--- a/sidebar.php
+++ b/sidebar.php
@@ -10,8 +10,8 @@
  */
 ?>
 
-	<?php if ( is_active_sidebar( 1 ) ) : ?>
+	<?php if ( is_active_sidebar( 'sidebar-1' ) ) : ?>
 		<div id="secondary" class="widget-area" role="complementary">
-			<?php dynamic_sidebar( 1 ); ?>
+			<?php dynamic_sidebar( 'sidebar-1' ); ?>
 		</div><!-- #secondary -->
 	<?php endif; ?>
\ No newline at end of file