diff --git a/index.d.ts b/index.d.ts
index 0ebd3f0..49ff853 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -42,6 +42,7 @@ export interface AxiosRequestConfig {
   maxContentLength?: number;
   validateStatus?: (status: number) => boolean;
   maxRedirects?: number;
+  socketPath?: string | null;
   httpAgent?: any;
   httpsAgent?: any;
   proxy?: AxiosProxyConfig | false;