diff --git a/roles/wsgi_website/defaults/main.yml b/roles/wsgi_website/defaults/main.yml
index 892275b9e5cb3d40ebed15954a0b8188604ebe25..741fb6bc4983c35763b9f779d545dee8e98c2a78 100644
--- a/roles/wsgi_website/defaults/main.yml
+++ b/roles/wsgi_website/defaults/main.yml
@@ -7,6 +7,7 @@ rewrites: []
 static_locations: []
 use_paste: False
 virtualenv_packages: []
+environment_variables: {}
 admin: "web-{{ fqdn | replace('.', '_') }}"
 https_tls_certificate: "{{ lookup('file', tls_certificate_dir + '/' + fqdn + '_https.pem') }}"
 https_tls_key: "{{ lookup('file', tls_private_key_dir + '/' + fqdn + '_https.key') }}"