diff --git a/wp-admin/network/site-themes.php b/wp-admin/network/site-themes.php
index 1d7c3bebf4..5358f2e967 100644
--- a/wp-admin/network/site-themes.php
+++ b/wp-admin/network/site-themes.php
@@ -162,6 +162,7 @@ if ( isset( $_GET['enabled'] ) ) {
 
 <form method="get" action="">
 <?php $wp_list_table->search_box( __( 'Search Installed Themes' ), 'theme' ); ?>
+<input type="hidden" name="id" value="<?php echo esc_attr( $id ) ?>" />
 </form>
 
 <?php $wp_list_table->views(); ?>
diff --git a/wp-admin/network/site-users.php b/wp-admin/network/site-users.php
index 26b6abb934..ba4d9b5fa1 100644
--- a/wp-admin/network/site-users.php
+++ b/wp-admin/network/site-users.php
@@ -218,6 +218,7 @@ endif; ?>
 
 <form class="search-form" action="" method="get">
 <?php $wp_list_table->search_box( __( 'Search Users' ), 'user' ); ?>
+<input type="hidden" name="id" value="<?php echo esc_attr( $id ) ?>" />
 </form>
 
 <?php $wp_list_table->views(); ?>