diff --git a/sitemap.php b/sitemap.php
index a81cf1d..6776622 100644
--- a/sitemap.php
+++ b/sitemap.php
@@ -40,7 +40,7 @@ class sitemap
     $type = $finfo->buffer ($content);
     if ($type === "text/plain" || $type === "application/x-empty")
       return $this->analyzeText ($content, $url);
-    elseif ($type === "application/xml")
+    elseif ($type === "application/xml" || $type === "text/xml")
       return $this->analyzeXML ($content, $url);
     else
       throw new \Exception ("Type of sitemap '$type' unknown for '$url'", 406);