diff --git a/src/rpc/server.ts b/src/rpc/server.ts
index e3c518efb..a0d09f2ba 100644
--- a/src/rpc/server.ts
+++ b/src/rpc/server.ts
@@ -75,7 +75,7 @@ export class Server {
   constructor(serverURL: string, opts: Server.Options = {}) {
     this.serverURL = URI(serverURL);
 
-    if (opts.headers && Object.keys(opts.headers).length === 0) {
+    if (opts.headers && Object.keys(opts.headers).length !== 0) {
       AxiosClient.interceptors.request.use((config: any) => {
         // merge the custom headers into any existing headers
         config.headers = Object.assign(config.headers, opts.headers);