diff --git a/lib/node_modules/@stdlib/fs/read-dir/examples/index.js b/lib/node_modules/@stdlib/fs/read-dir/examples/index.js
index 244a18f2d158..1c41291ce3f8 100644
--- a/lib/node_modules/@stdlib/fs/read-dir/examples/index.js
+++ b/lib/node_modules/@stdlib/fs/read-dir/examples/index.js
@@ -18,6 +18,7 @@
 
 'use strict';
 
+var isError = require( '@stdlib/assert/is-error' );
 var readDir = require( './../lib' );
 
 /* Sync */
@@ -25,13 +26,13 @@ var readDir = require( './../lib' );
 var out = readDir.sync( __dirname );
 // returns <Array>
 
-console.log( out instanceof Error );
+console.log( isError( out ) );
 // => false
 
 out = readDir.sync( 'beepboop' );
 // returns <Error>
 
-console.log( out instanceof Error );
+console.log( isError( out ) );
 // => true
 
 /* Async */