diff --git a/lib/internal/inspector/_inspect.js b/lib/internal/inspector/_inspect.js
index b326a772fd39c9..dcfa74aed3efb9 100644
--- a/lib/internal/inspector/_inspect.js
+++ b/lib/internal/inspector/_inspect.js
@@ -340,6 +340,7 @@ function startInspect(argv = process.argv.slice(2),
 
     console.error(`Usage: ${invokedAs} script.js`);
     console.error(`       ${invokedAs} <host>:<port>`);
+    console.error(`       ${invokedAs} --port=<port>`);
     console.error(`       ${invokedAs} -p <pid>`);
     process.exit(1);
   }