diff --git a/libs/langchain/langchain/chains/router/multi_prompt_prompt.py b/libs/langchain/langchain/chains/router/multi_prompt_prompt.py
index 5221ea9334d..b879e718a4e 100644
--- a/libs/langchain/langchain/chains/router/multi_prompt_prompt.py
+++ b/libs/langchain/langchain/chains/router/multi_prompt_prompt.py
@@ -28,4 +28,5 @@ modifications are needed.
 {{input}}
 
 << OUTPUT (must include ```json at the start of the response) >>
+<< OUTPUT (must end with ```) >>
 """