diff --git a/litellm/llms/ollama/chat/transformation.py b/litellm/llms/ollama/chat/transformation.py
index cdc0ad00786..e63448fc0d6 100644
--- a/litellm/llms/ollama/chat/transformation.py
+++ b/litellm/llms/ollama/chat/transformation.py
@@ -172,7 +172,13 @@ class OllamaChatConfig(BaseConfig):
                     optional_params["format"] = value["json_schema"]["schema"]
             if (
                 param == "reasoning_effort"
-                and (think := think_from_reasoning_effort(model, cast(object, value))) is not None
+                and (
+                    think := think_from_reasoning_effort(
+                        model,
+                        cast(object, value),  # cast-ok: [LIT006] untyped dict value, widened to object for the helper
+                    )
+                )
+                is not None
             ):
                 optional_params["think"] = think
             ### FUNCTION CALLING LOGIC ###
diff --git a/litellm/llms/ollama/completion/transformation.py b/litellm/llms/ollama/completion/transformation.py
index b0cb2d4ed27..b712bb7cc5b 100644
--- a/litellm/llms/ollama/completion/transformation.py
+++ b/litellm/llms/ollama/completion/transformation.py
@@ -216,7 +216,13 @@ class OllamaConfig(BaseConfig):
                 optional_params["stop"] = value
             elif (
                 param == "reasoning_effort"
-                and (think := think_from_reasoning_effort(model, cast(object, value))) is not None
+                and (
+                    think := think_from_reasoning_effort(
+                        model,
+                        cast(object, value),  # cast-ok: [LIT006] untyped dict value, widened to object for the helper
+                    )
+                )
+                is not None
             ):
                 optional_params["think"] = think
             elif param == "response_format" and isinstance(value, dict):