diff --git a/trustgraph-flow/trustgraph/agent/react/service.py b/trustgraph-flow/trustgraph/agent/react/service.py
index 5d19df71..3af851d2 100755
--- a/trustgraph-flow/trustgraph/agent/react/service.py
+++ b/trustgraph-flow/trustgraph/agent/react/service.py
@@ -375,6 +375,7 @@ class Processor(AgentService):
                         answer=act.final,
                         error=None,
                         thought=None,
+                        observation=None,
                         end_of_message=True,
                         end_of_dialog=True,
                     )