diff --git a/libs/langchain/langchain/retrievers/document_compressors/cohere_rerank.py b/libs/langchain/langchain/retrievers/document_compressors/cohere_rerank.py
index 8199fa46dd..3db3f7c92f 100644
--- a/libs/langchain/langchain/retrievers/document_compressors/cohere_rerank.py
+++ b/libs/langchain/langchain/retrievers/document_compressors/cohere_rerank.py
@@ -29,6 +29,8 @@ class CohereRerank(BaseDocumentCompressor):
     model: str = "rerank-english-v2.0"
     """Model to use for reranking."""
 
+    cohere_api_key: Optional[str] = None
+
     class Config:
         """Configuration for this pydantic object."""