diff --git a/apps/web_theme/templates/web_theme_base.html b/apps/web_theme/templates/web_theme_base.html
index c55015fb83..56aa5294cb 100644
--- a/apps/web_theme/templates/web_theme_base.html
+++ b/apps/web_theme/templates/web_theme_base.html
@@ -15,7 +15,7 @@
 
 		{% compress css %}
         <link rel="stylesheet" href="{{ STATIC_URL }}web_theme_media/stylesheets/base.css" type="text/css" media="screen" />
-        <link rel="stylesheet" id="current-theme" href="{{ STATIC_URL }}web_theme_media/stylesheets/themes/{{ web_theme }}/style.css" type="text/css" media="screen" />
+        <link rel="stylesheet" id="current-theme" href="{{ STATIC_URL }}web_theme_media/stylesheets/themes/{{ web_theme|default:'activo' }}/style.css" type="text/css" media="screen" />
         <style type="text/css">
             .message span.dismiss {
                 padding:0 5px;