diff --git a/litellm/llms/deepseek/chat/transformation.py b/litellm/llms/deepseek/chat/transformation.py
index 03f58659ca7..d6df926d19f 100644
--- a/litellm/llms/deepseek/chat/transformation.py
+++ b/litellm/llms/deepseek/chat/transformation.py
@@ -49,12 +49,11 @@ class DeepSeekChatConfig(OpenAIGPTConfig):
 
         # Handle thinking parameter - accept {"type": "enabled"} or {"type": "disabled"}
         if thinking_value is not None:
-            if isinstance(thinking_value, dict) and thinking_value.get(
-                "type"
-            ) in ("enabled", "disabled"):
-                optional_params["thinking"] = {
-                    "type": thinking_value["type"]
-                }
+            if isinstance(thinking_value, dict) and thinking_value.get("type") in (
+                "enabled",
+                "disabled",
+            ):
+                optional_params["thinking"] = {"type": thinking_value["type"]}
 
         # Handle reasoning_effort - map to thinking enabled/disabled
         elif reasoning_effort is not None: