diff --git a/libs/core/langchain_core/prompts/chat.py b/libs/core/langchain_core/prompts/chat.py
index 2254eb2f01c..a53f1bb251c 100644
--- a/libs/core/langchain_core/prompts/chat.py
+++ b/libs/core/langchain_core/prompts/chat.py
@@ -1177,7 +1177,7 @@ class ChatPromptTemplate(BaseChatPromptTemplate):
                   A message can be represented using the following formats:
                   (1) BaseMessagePromptTemplate, (2) BaseMessage, (3) 2-tuple of
                   (message type, template); e.g., ("human", "{user_input}"),
-                  (4) 2-tuple of (message class, template), (4) a string which is
+                  (4) 2-tuple of (message class, template), (5) a string which is
                   shorthand for ("human", template); e.g., "{user_input}".
             template_format: format of the template. Defaults to "f-string".