diff --git a/admin/woocommerce-admin-reports.php b/admin/woocommerce-admin-reports.php
index 07acbf9f22b..41cbe470b19 100644
--- a/admin/woocommerce-admin-reports.php
+++ b/admin/woocommerce-admin-reports.php
@@ -1918,7 +1918,7 @@ function woocommerce_category_sales() {
 	$current_year 	= isset( $_POST['show_year'] ) 	? $_POST['show_year'] 	: date( 'Y', current_time( 'timestamp' ) );
 	$start_date 	= strtotime( $current_year . '0101' );
 
-	$categories = get_terms( 'product_cat', array( 'parent' => 0 ) );
+	$categories = get_terms( 'product_cat', array( 'orderby' => 'name' ) );
 	?>
 	<form method="post" action="" class="report_filters">
 		<p>
@@ -1932,14 +1932,16 @@ function woocommerce_category_sales() {
 
 			<select multiple="multiple" class="chosen_select" id="show_categories" name="show_categories[]" style="width: 300px;">
 				<?php
-					foreach ( $categories as $category ) {
-						if ( $category->parent > 0 )
-							$prepend = '&mdash; ';
-						else
-							$prepend = '';
+					$r = array();
+					$r['pad_counts'] 	= 1;
+					$r['hierarchal'] 	= 1;
+					$r['hide_empty'] 	= 1;
+					$r['value']			= 'id';
+					$r['selected'] 		= isset( $_POST['show_categories'] ) ? $_POST['show_categories'] : '';
 
-						echo '<option value="' . $category->term_id . '" ' . selected( ! empty( $_POST['show_categories'] ) && in_array( $category->term_id, $_POST['show_categories'] ), true ) . '>' . $prepend . $category->name . '</option>';
-					}
+					include_once( $woocommerce->plugin_path() . '/classes/walkers/class-product-cat-dropdown-walker.php' );
+
+					echo woocommerce_walk_category_dropdown_tree( $categories, 0, $r );
 				?>
 			</select>
 
diff --git a/classes/walkers/class-product-cat-dropdown-walker.php b/classes/walkers/class-product-cat-dropdown-walker.php
index fdd77cfb987..346c0f23e9b 100644
--- a/classes/walkers/class-product-cat-dropdown-walker.php
+++ b/classes/walkers/class-product-cat-dropdown-walker.php
@@ -29,16 +29,19 @@ class WC_Product_Cat_Dropdown_Walker extends Walker {
 		$pad = str_repeat('&nbsp;', $depth * 3);
 
 		$cat_name = apply_filters( 'list_product_cats', $cat->name, $cat );
-		$output .= "\t<option class=\"level-$depth\" value=\"" . $cat->slug . "\"";
 
-		if ( $cat->slug == $args['selected'] )
+		$value = isset( $args['value'] ) && $args['value'] == 'id' ? $cat->term_id : $cat->slug;
+
+		$output .= "\t<option class=\"level-$depth\" value=\"" . $value . "\"";
+
+		if ( $value == $args['selected'] || ( is_array( $args['selected'] ) && in_array( $value, $args['selected'] ) ) )
 			$output .= ' selected="selected"';
 
 		$output .= '>';
 
 		$output .= $pad . __( $cat_name, 'woocommerce' );
 
-		if ( $args['show_count'] )
+		if ( ! empty( $args['show_count'] ) )
 			$output .= '&nbsp;(' . $cat->count . ')';
 
 		$output .= "</option>\n";