diff --git a/lib/webdriveragent.js b/lib/webdriveragent.js
index a8019e056..f5cda7ee3 100644
--- a/lib/webdriveragent.js
+++ b/lib/webdriveragent.js
@@ -58,7 +58,7 @@ export class WebDriverAgent {
     this.setWDAPaths(args.bootstrapPath, args.agentPath);
 
     this.wdaLocalPort = args.wdaLocalPort;
-    this.wdaRemotePort = (this.isRealDevice ? (args.wdaRemotePort ?? args.wdaLocalPort) : args.wdaLocalPort)
+    this.wdaRemotePort = ((this.isRealDevice ? args.wdaRemotePort : null) ?? args.wdaLocalPort)
       || WDA_AGENT_PORT;
     this.wdaBaseUrl = args.wdaBaseUrl || WDA_BASE_URL;