diff --git a/front/components/assistant/conversation/AgentMessage.tsx b/front/components/assistant/conversation/AgentMessage.tsx
index 181e1ce64f81..7739ad60b49e 100644
--- a/front/components/assistant/conversation/AgentMessage.tsx
+++ b/front/components/assistant/conversation/AgentMessage.tsx
@@ -163,7 +163,7 @@ export function AgentMessage({
 
   useEventSource(buildEventSourceURL, onEventCallback);
 
-  const agentMessageToRender = (() => {
+  const agentMessageToRender = ((): AgentMessageType => {
     switch (message.status) {
       case "succeeded":
       case "failed":