diff --git a/libs/langchain/langchain/memory/buffer_window.py b/libs/langchain/langchain/memory/buffer_window.py
index 7aa9fa59c72..d1be93974aa 100644
--- a/libs/langchain/langchain/memory/buffer_window.py
+++ b/libs/langchain/langchain/memory/buffer_window.py
@@ -21,7 +21,7 @@ class ConversationBufferWindowMemory(BaseChatMemory):
 
     @property
     def buffer_as_str(self) -> str:
-        """Exposes the buffer as a string in case return_messages is True."""
+        """Exposes the buffer as a string in case return_messages is False."""
         messages = self.chat_memory.messages[-self.k * 2 :] if self.k > 0 else []
         return get_buffer_string(
             messages,