diff --git a/dspy/predict/react.py b/dspy/predict/react.py
index ce8edaa46d..bf7afb1851 100644
--- a/dspy/predict/react.py
+++ b/dspy/predict/react.py
@@ -64,7 +64,7 @@ def __init__(self, signature, tools: list[Callable], max_iters=5):
         )
 
         fallback_signature = (
-            dspy.Signature({**signature.input_fields, **signature.output_fields})
+            dspy.Signature({**signature.input_fields, **signature.output_fields}, signature.instructions)
             .append("trajectory", dspy.InputField(), type_=str)
         )