diff --git a/Gruntfile.js b/Gruntfile.js
index 355a8989db3db..d196c51152658 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -612,6 +612,17 @@ module.exports = function(grunt) {
 					dest: WORKING_DIR + 'wp-includes/build/',
 				} ],
 			},
+			'gutenberg-js': {
+				files: [ {
+					expand: true,
+					cwd: 'gutenberg/build',
+					src: [
+						'pages/**/*.js',
+						'routes/**/*.js',
+					],
+					dest: WORKING_DIR + 'wp-includes/build/',
+				} ],
+			},
 			'gutenberg-modules': {
 				files: [ {
 					expand: true,
@@ -2041,6 +2052,7 @@ module.exports = function(grunt) {
 
 	grunt.registerTask( 'build:gutenberg', [
 		'copy:gutenberg-php',
+		'copy:gutenberg-js',
 		'gutenberg:copy',
 		'copy:gutenberg-modules',
 		'copy:gutenberg-styles',