diff --git a/setupext.py b/setupext.py
index fa685c7e172d..f8036157a80f 100644
--- a/setupext.py
+++ b/setupext.py
@@ -744,6 +744,7 @@ def get_package_data(self):
                 'mpl-data/example/*.npy',
                 'mpl-data/matplotlibrc',
                 'backends/web_backend/*.*',
+                'backends/web_backend/js/*.*',
                 'backends/web_backend/jquery/js/*.min.js',
                 'backends/web_backend/jquery/css/themes/base/*.min.css',
                 'backends/web_backend/jquery/css/themes/base/images/*',