diff --git a/build/release.js b/build/release.js
index 193f958953e..17b26a4677c 100644
--- a/build/release.js
+++ b/build/release.js
@@ -131,6 +131,21 @@ Release.define( {
 			shell.mkdir( "-p", "dist/cdn" );
 			shell.cp( tmpFolder + "/jquery-ui*.js", "dist/cdn" );
 			shell.cp( "-r", tmpFolder + "/themes", "dist/cdn" );
+
+			// Copy JS & CSS (base theme) files in unminified & minified
+			// versions to `dist/`.
+			shell.cp( "dist/cdn/jquery-ui.js", "dist" );
+			shell.cp( "dist/cdn/jquery-ui.min.js", "dist" );
+			shell.cp( "dist/cdn/themes/base/jquery-ui.css", "dist" );
+			shell.cp( "dist/cdn/themes/base/jquery-ui.min.css", "dist" );
+
+			Release.exec( "git add dist/cdn/jquery-ui.js", "Error adding jquery-ui.js." );
+			Release.exec( "git add dist/cdn/jquery-ui.min.js",
+				"Error adding jquery-ui.min.js." );
+			Release.exec( "git add dist/cdn/jquery-ui.css", "Error adding jquery-ui.css." );
+			Release.exec( "git add dist/cdn/jquery-ui.min.css",
+				"Error adding jquery-ui.min.css." );
+
 			fn( files );
 		} );
 	}