diff --git a/inc/site-exporter/class-site-exporter.php b/inc/site-exporter/class-site-exporter.php
index ffc50696..cf60e286 100644
--- a/inc/site-exporter/class-site-exporter.php
+++ b/inc/site-exporter/class-site-exporter.php
@@ -1420,10 +1420,14 @@ public function enqueue_wp_sites_scripts(string $hook): void {
 		 * registered on the parent page using event delegation so it is present
 		 * before the modal opens.
 		 *
-		 * Hook: "wp-ultimo_page_wp-ultimo-sites" (network admin submenu under
-		 * parent slug "wp-ultimo", menu slug "wp-ultimo-sites").
+		 * The `wp-ultimo` parent is an admin-bar menu rather than a registered
+		 * WordPress admin-menu parent. WordPress therefore emits
+		 * `admin_page_wp-ultimo-sites` for the network Sites page. Keep the
+		 * legacy submenu hook too for installations that register that parent.
 		 */
-		if ('wp-ultimo_page_wp-ultimo-sites' === $hook) {
+		$wp_sites_hooks = ['admin_page_wp-ultimo-sites', 'wp-ultimo_page_wp-ultimo-sites'];
+
+		if (in_array($hook, $wp_sites_hooks, true)) {
 			wp_enqueue_media();
 
 			wp_add_inline_script(
diff --git a/tests/WP_Ultimo/Site_Exporter_Test.php b/tests/WP_Ultimo/Site_Exporter_Test.php
index 4f54f911..843c4584 100644
--- a/tests/WP_Ultimo/Site_Exporter_Test.php
+++ b/tests/WP_Ultimo/Site_Exporter_Test.php
@@ -246,6 +246,24 @@ public function test_wp_sites_row_actions_include_subsite_export_and_promotion()
 		$this->assertArrayHasKey('promote_main_site', $actions, 'Subsites must still offer Promote to Main Site');
 	}
 
+	/**
+	 * Test the Ultimate Multisite Sites page receives the delegated ZIP-upload handler.
+	 */
+	public function test_wp_sites_scripts_enqueue_zip_upload_handler_for_actual_admin_hook(): void {
+
+		$this->exporter->enqueue_wp_sites_scripts('admin_page_wp-ultimo-sites');
+
+		$this->assertTrue(
+			wp_script_is('media-editor', 'registered'),
+			'The media editor script must be available on the Ultimate Multisite Sites page'
+		);
+
+		$inline_scripts = wp_scripts()->get_data('media-editor', 'after');
+
+		$this->assertIsArray($inline_scripts);
+		$this->assertStringContainsString('#wu-upload-zip-btn', implode("\n", $inline_scripts));
+	}
+
 	/**
 	 * Test that bulk exports include the main site instead of silently skipping it.
 	 */