diff --git a/libs/aws/langchain_aws/llms/bedrock.py b/libs/aws/langchain_aws/llms/bedrock.py
index cced42c..6abb081 100644
--- a/libs/aws/langchain_aws/llms/bedrock.py
+++ b/libs/aws/langchain_aws/llms/bedrock.py
@@ -990,11 +990,7 @@ async def _aprepare_input_and_invoke_stream(
         _model_kwargs = self.model_kwargs or {}
         provider = self._get_provider()
 
-        if stop:
-            if provider not in self.provider_stop_sequence_key_name_map:
-                raise ValueError(
-                    f"Stop sequence key name for {provider} is not supported."
-                )
+        if stop and provider in self.provider_stop_sequence_key_name_map:
             if k := self.provider_stop_sequence_key_name_map.get(provider):
                 _model_kwargs[k] = stop