diff --git a/supabase/functions/validate-telegram-bot/index.ts b/supabase/functions/validate-telegram-bot/index.ts
index b4c02f4..b940bbe 100644
--- a/supabase/functions/validate-telegram-bot/index.ts
+++ b/supabase/functions/validate-telegram-bot/index.ts
@@ -221,6 +221,7 @@ Deno.serve(async (req) => {
           headers: {
             "Content-Type": "application/json",
             Authorization: `Bearer ${serviceKey}`,
+            "X-Internal-Secret": Deno.env.get("INTERNAL_FUNCTION_SECRET") ?? "",
           },
           body: JSON.stringify({ agent_instance_id: agent.id }),
         }).catch((err) => console.error("auto-provision fetch error:", err));