diff --git a/includes/class-hvac-activator.php b/includes/class-hvac-activator.php
index c030b382..997fb195 100644
--- a/includes/class-hvac-activator.php
+++ b/includes/class-hvac-activator.php
@@ -40,10 +40,10 @@ class HVAC_Activator {
         // Schedule cron jobs
         self::schedule_cron_jobs();
         
-        // Register legacy redirects before flushing
-        if (class_exists('HVAC_Plugin')) {
-            $plugin = HVAC_Plugin::instance();
-            $plugin->register_legacy_rewrite_rules();
+        // Register routes before flushing
+        if (class_exists('HVAC_Route_Manager')) {
+            $route_manager = HVAC_Route_Manager::instance();
+            $route_manager->register_rewrite_rules();
         }
         
         // Flush rewrite rules