diff --git a/src/agents/transport-stream-shared.ts b/src/agents/transport-stream-shared.ts
index d00ca3daba3d..965b9bfbbcaf 100644
--- a/src/agents/transport-stream-shared.ts
+++ b/src/agents/transport-stream-shared.ts
@@ -186,7 +186,7 @@ function normalizeTransportErrorBody(value: unknown): string | undefined {
   return truncateErrorDetail(redactSensitiveText(text), 500);
 }
 
-export function extractTransportErrorDetails(error: unknown): TransportErrorDetails {
+function extractTransportErrorDetails(error: unknown): TransportErrorDetails {
   const errorObject = error && typeof error === "object" ? error : undefined;
   const nestedError = readObjectProperty(errorObject, "error");
   const errorCode =