diff --git a/llama_stack/providers/inline/agents/meta_reference/agent_instance.py b/llama_stack/providers/inline/agents/meta_reference/agent_instance.py
index 49149d886..7df5d3bd4 100644
--- a/llama_stack/providers/inline/agents/meta_reference/agent_instance.py
+++ b/llama_stack/providers/inline/agents/meta_reference/agent_instance.py
@@ -169,6 +169,7 @@ class ChatAgent(ShieldRunnerMixin):
             messages.extend(request.messages)
 
             turn_id = str(uuid.uuid4())
+            span.set_attribute("turn_id", turn_id)
             start_time = datetime.now()
             yield AgentTurnResponseStreamChunk(
                 event=AgentTurnResponseEvent(