diff --git a/src/Service/MQTTClient.php b/src/Service/MQTTClient.php
index 6f7341cf..ccf03839 100644
--- a/src/Service/MQTTClient.php
+++ b/src/Service/MQTTClient.php
@@ -85,7 +85,7 @@ class MQTTClient
             $phone_num = $sess['data']->getPhoneNumber();
 
             // use appropriate prefix so we have different channel names for new api
-            $prefix = $sess->legacy ? self::PREFIX : self::PREFIX_APIv2;
+            $prefix = $sess['legacy'] ? self::PREFIX : self::PREFIX_APIv2;
             $channel = $prefix . $phone_num;
 
             error_log("SENDING TO CHANNEL: " . $channel);