diff --git a/litellm/integrations/langfuse/langfuse.py b/litellm/integrations/langfuse/langfuse.py
index a98771387c0..f116eb8041b 100644
--- a/litellm/integrations/langfuse/langfuse.py
+++ b/litellm/integrations/langfuse/langfuse.py
@@ -642,7 +642,7 @@ class LangFuseLogger:
 
             generation_id = None
             usage = None
-            usage_details : Optional[LangfuseUsageDetails] = None
+            usage_details = None
             if response_obj is not None:
                 if (
                     hasattr(response_obj, "id")
@@ -659,12 +659,10 @@ class LangFuseLogger:
                         "completion_tokens": _usage_obj.completion_tokens,
                         "total_cost": cost if self._supports_costs() else None,
                     }
-                    usage_details = {
-                        "input": _usage_obj.prompt_tokens,
-                        "output": _usage_obj.completion_tokens,
-                        "cache_creation_input_tokens": _usage_obj.get('cache_creation_input_tokens', 0),
-                        "cache_read_input_tokens": _usage_obj.get('cache_read_input_tokens', 0)
-                    }
+                    usage_details = LangfuseUsageDetails(input=_usage_obj.prompt_tokens,
+                                                        output=_usage_obj.completion_tokens,
+                                                        cache_creation_input_tokens=_usage_obj.get('cache_creation_input_tokens', 0),
+                                                        cache_read_input_tokens=_usage_obj.get('cache_read_input_tokens', 0))
 
             generation_name = clean_metadata.pop("generation_name", None)
             if generation_name is None: