diff --git a/www/js/fly-ws.js b/www/js/fly-ws.js
index 80a019a..4f15f54 100644
--- a/www/js/fly-ws.js
+++ b/www/js/fly-ws.js
@@ -33,7 +33,7 @@ class FLYSocket {
             let packetID = data.getInt8(this.pointer++);
             packets.push({
                     packetID: packetID,
-                    value: (this["handle_packet" + packetID] || this.handle_packetInvalid)(data)
+                    value: (this["handle_packet" + packetID] || this.handle_packetInvalid).call(this, data)
                 });
         }