diff --git a/app/MetaGer.php b/app/MetaGer.php
index bb8e8c8f4ff559cc4cd2da879b1054c56a9259c6..3209479b34c94e1e283a4f06392452465afebffe 100644
--- a/app/MetaGer.php
+++ b/app/MetaGer.php
@@ -1019,7 +1019,7 @@ class MetaGer
         
         $this->out = $request->input('out', "html");
         # Standard output format html
-        if ($this->out !== "html" && $this->out !== "json" && $this->out !== "results" && $this->out !== "results-with-style" && $this->out !== "result-count" && $this->out !== "rss20" && $this->out !== "rich") {
+        if ($this->out !== "html" && $this->out !== "json" && $this->out !== "results" && $this->out !== "results-with-style" && $this->out !== "result-count" && $this->out !== "rss20" && $this->out !== "atom10" && $this->out !== "rich") {
             $this->out = "html";
         }
         # Wir schalten den Cache aus, wenn die Ergebniszahl überprüft werden soll