diff --git a/wcs/compat.py b/wcs/compat.py
index af3ecab0d..c097e6271 100644
--- a/wcs/compat.py
+++ b/wcs/compat.py
@@ -207,6 +207,7 @@ class CompatWcsPublisher(WcsPublisher):
         return django_response
 
     def set_app_dir(self, request):
+        settings.THEME_SKELETON_URL = None
         super().set_app_dir(request)
         settings.THEME_SKELETON_URL = self.get_site_option('theme_skeleton_url')