diff --git a/litellm/proxy/litellm_pre_call_utils.py b/litellm/proxy/litellm_pre_call_utils.py
index 6aab53f43a..6cd7dca743 100644
--- a/litellm/proxy/litellm_pre_call_utils.py
+++ b/litellm/proxy/litellm_pre_call_utils.py
@@ -602,7 +602,7 @@ async def add_litellm_data_to_request(  # noqa: PLR0915
     )
 
     verbose_proxy_logger.debug(
-        f"[PROXY]returned data from litellm_pre_call_utils: {data}"
+        "[PROXY] returned data from litellm_pre_call_utils: %s", data
     )
 
     ## ENFORCED PARAMS CHECK