diff --git a/themes/pelican-striped-html5up/templates/base.html b/themes/pelican-striped-html5up/templates/base.html
index 1c228f1..27d90c3 100644
--- a/themes/pelican-striped-html5up/templates/base.html
+++ b/themes/pelican-striped-html5up/templates/base.html
@@ -17,16 +17,16 @@
         <link href="{{ FEED_DOMAIN }}/{{ FEED_RSS }}" type="application/rss+xml" rel="alternate" title="{{ SITENAME }} RSS Feed" />
         {% endif %}
         {% if CATEGORY_FEED_ATOM and category %}
-        <link href="{{ FEED_DOMAIN }}/{{ CATEGORY_FEED_ATOM|format(category.slug) }}" type="application/atom+xml" rel="alternate" title="{{ SITENAME }} Categories Atom Feed" />
+        <link href="{{ FEED_DOMAIN }}/{{ CATEGORY_FEED_ATOM.format(slug='category.slug') }}" type="application/atom+xml" rel="alternate" title="{{ SITENAME }} Categories Atom Feed" />
         {% endif %}
         {% if CATEGORY_FEED_RSS and category %}
-        <link href="{{ FEED_DOMAIN }}/{{ CATEGORY_FEED_RSS|format(category.slug) }}" type="application/rss+xml" rel="alternate" title="{{ SITENAME }} Categories RSS Feed" />
+        <link href="{{ FEED_DOMAIN }}/{{ CATEGORY_FEED_RSS.format(slug='category.slug') }}" type="application/rss+xml" rel="alternate" title="{{ SITENAME }} Categories RSS Feed" />
         {% endif %}
         {% if TAG_FEED_ATOM and tag %}
-        <link href="{{ FEED_DOMAIN }}/{{ TAG_FEED_ATOM|format(tag.slug) }}" type="application/atom+xml" rel="alternate" title="{{ SITENAME }} Tags Atom Feed" />
+        <link href="{{ FEED_DOMAIN }}/{{ TAG_FEED_ATOM.format(slug='tag.slug') }}" type="application/atom+xml" rel="alternate" title="{{ SITENAME }} Tags Atom Feed" />
         {% endif %}
         {% if TAG_FEED_RSS and tag %}
-        <link href="{{ FEED_DOMAIN }}/{{ TAG_FEED_RSS|format(tag.slug) }}" type="application/rss+xml" rel="alternate" title="{{ SITENAME }} Tags RSS Feed" />
+        <link href="{{ FEED_DOMAIN }}/{{ TAG_FEED_RSS.format(slug='tag.slug') }}" type="application/rss+xml" rel="alternate" title="{{ SITENAME }} Tags RSS Feed" />
         {% endif %}
         {% endblock head %}
         <link rel="stylesheet" href="/theme/css/main.css" />