diff --git a/lib/SimpleSAML/Error/Error.php b/lib/SimpleSAML/Error/Error.php
index eb21fc578ceabd4adc0de24b6d81ec8b03819202..7689d5f7525993096c49c981688559736db86e30 100644
--- a/lib/SimpleSAML/Error/Error.php
+++ b/lib/SimpleSAML/Error/Error.php
@@ -206,7 +206,7 @@ class SimpleSAML_Error_Error extends SimpleSAML_Error_Exception
      */
     protected function saveError()
     {
-        $data = $this->format();
+        $data = $this->format(true);
         $emsg = array_shift($data);
         $etrace = implode("\n", $data);