diff --git a/purge.inc b/purge.inc
index 7d2e42c..cd51cd7 100644
--- a/purge.inc
+++ b/purge.inc
@@ -88,6 +88,8 @@ function purge_urls($purge_urls) {
       elseif ($method == 'ah') {
         // Make it a PURGE request (not GET or POST)
         $purge_requests[$current_purge_request]['request_method'] = 'PURGE';
+        // Construct a new url
+        $proxy_url_base = $proxy_url_parts['scheme'] . "://" . $proxy_url_parts['host'];
         // Construct a new path retaining the url query string (#1299776 by djboddydrake)
         $purge_path = array_key_exists('query', $purge_url_parts) ? $purge_url_parts['path']
           . '?' . $purge_url_parts['query'] : $purge_url_parts['path'];