diff --git a/litellm/llms/bedrock/base_aws_llm.py b/litellm/llms/bedrock/base_aws_llm.py
index 642d15fe3ed..1de1c40c438 100644
--- a/litellm/llms/bedrock/base_aws_llm.py
+++ b/litellm/llms/bedrock/base_aws_llm.py
@@ -1163,7 +1163,7 @@ class BaseAWSLLM:
 
     def _sign_request(
         self,
-        service_name: Literal["bedrock", "sagemaker", "bedrock-agentcore"],
+        service_name: Literal["bedrock", "sagemaker", "bedrock-agentcore", "s3vectors"],
         headers: dict,
         optional_params: dict,
         request_data: dict,