diff --git a/wagtail/contrib/wagtailfrontendcache/utils.py b/wagtail/contrib/wagtailfrontendcache/utils.py
index 9737ebbb0..b95ed7e95 100644
--- a/wagtail/contrib/wagtailfrontendcache/utils.py
+++ b/wagtail/contrib/wagtailfrontendcache/utils.py
@@ -26,9 +26,9 @@ class CustomHTTPAdapter(HTTPAdapter):
 
 def purge_page_from_cache(page):
     # Get session
-    varnish_url = getattr(settings, 'WAGTAILFRONTENDCACHE_LOCATION', 'http://127.0.0.1:8000/')
+    cache_server_url = getattr(settings, 'WAGTAILFRONTENDCACHE_LOCATION', 'http://127.0.0.1:8000/')
     session = requests.Session()
-    session.mount('http://', CustomHTTPAdapter(varnish_url))
+    session.mount('http://', CustomHTTPAdapter(cache_server_url))
 
     # Purge paths from cache
     for path in page.get_cached_paths():