diff --git a/system/src/Grav/Common/Twig/TwigExtension.php b/system/src/Grav/Common/Twig/TwigExtension.php
index 6b3379fe12..ea0ffa7cd8 100644
--- a/system/src/Grav/Common/Twig/TwigExtension.php
+++ b/system/src/Grav/Common/Twig/TwigExtension.php
@@ -1121,11 +1121,12 @@ public function niceNumberFunc($n)
      * Get a theme variable
      *
      * @param $var
+     * @param bool $default
      * @return string
      */
-    public function themeVarFunc($var)
+    public function themeVarFunc($var, $default = null)
     {
-        return $this->config->get('theme.' . $var, false) ?: '';
+        return $this->config->get('theme.' . $var, $default);
     }
 
     /**