diff --git a/lib/SimpleSAML/XHTML/Template.php b/lib/SimpleSAML/XHTML/Template.php
index 7ebb84b26c3266f73a2f974746708a72376886c0..042f068305c2a45fd88ff3f00a91a37b12049afe 100644
--- a/lib/SimpleSAML/XHTML/Template.php
+++ b/lib/SimpleSAML/XHTML/Template.php
@@ -72,7 +72,7 @@ class Template extends Response
     /**
      * Whether to use the new user interface or not.
      *
-     * @var string
+     * @var bool
      */
     private $useNewUI;