diff --git a/langchain/vectorstores/base.py b/langchain/vectorstores/base.py
index 8e04645222..4911c87a66 100644
--- a/langchain/vectorstores/base.py
+++ b/langchain/vectorstores/base.py
@@ -465,7 +465,7 @@ class VectorStoreRetriever(BaseRetriever):
     search_kwargs: dict = Field(default_factory=dict)
     allowed_search_types: ClassVar[Collection[str]] = (
         "similarity",
-        "similarityatscore_threshold",
+        "similarity_score_threshold",
         "mmr",
     )