diff --git a/src/components/tickets/ticket-summary-header.tsx b/src/components/tickets/ticket-summary-header.tsx
index 5505a97..f723b8a 100644
--- a/src/components/tickets/ticket-summary-header.tsx
+++ b/src/components/tickets/ticket-summary-header.tsx
@@ -315,9 +315,10 @@ export function TicketSummaryHeader({ ticket }: TicketHeaderProps) {
     | undefined
 
   // Live Chat
+  const ticketMachineId = ticket.machine?.id ?? null
   const liveChatSession = useQuery(
     api.liveChat.getTicketSession,
-    convexUserId && ticket.machineId
+    convexUserId && ticketMachineId
       ? { ticketId: ticket.id as Id<"tickets">, viewerId: convexUserId as Id<"users"> }
       : "skip"
   ) as {
@@ -334,7 +335,7 @@ export function TicketSummaryHeader({ ticket }: TicketHeaderProps) {
   const [isStartingChat, setIsStartingChat] = useState(false)
 
   // Verificar se máquina está online (para tickets com machineId)
-  const hasMachine = Boolean(ticket.machineId)
+  const hasMachine = Boolean(ticketMachineId)
   const machineOnline = liveChatSession?.machineOnline ?? false
   const hasActiveSession = Boolean(liveChatSession?.sessionId)
   const ticketHasAssignee = Boolean(ticket.assignee)