diff --git a/_includes/license-overview.html b/_includes/license-overview.html
index 1622174..80b9f51 100644
--- a/_includes/license-overview.html
+++ b/_includes/license-overview.html
@@ -8,17 +8,19 @@
   <div class="license-details">
     <div class="license-variations js-license-variations">
       <!-- always show this div, even w/o variations, for proper spacing -->
+      {% if page.tab-slug %}
       <ul class="nav-pills js-nav-pills">
         {% for variation in site.pages %}
           {% if variation.category and variation.category == page.category %}
-        <li{% if page.slug == variation.slug %} class="active"{% endif %}><a href="#{{ variation.slug }}" data-selected-tab="variation-{{ variation.slug }}">{{ variation.title }}</a></li>
+        <li{% if page.tab-slug == variation.tab-slug %} class="active"{% endif %}><a href="#{{ variation.tab-slug }}" data-selected-tab="variation-{{ variation.tab-slug }}">{{ variation.title }}</a></li>
           {% endif %}
         {% endfor %}
       </ul>
+      {% endif %}
     </div>
     {% for variation in site.pages %}
       {% if variation.category and variation.category == page.category %}
-    <div class="variation-tab variation-{{ variation.slug }} js-variation-tab{% if page.slug == variation.slug %} active{% endif %}">
+    <div class="variation-tab variation-{{ variation.tab-slug }} js-variation-tab{% if page.tab-slug == variation.tab-slug %} active{% endif %}">
       <table class='license-rules'>
         <tr>
         {% assign types = "required|permitted|forbidden" | split: "|" %}
diff --git a/licenses/agpl.txt b/licenses/agpl.txt
index afc9406..328317d 100644
--- a/licenses/agpl.txt
+++ b/licenses/agpl.txt
@@ -1,7 +1,7 @@
 ---
 title: Affero GPL
 category: GPL
-slug: agpl
+tab-slug: agpl
 hide-from-license-list: true
 layout: license
 permalink: /licenses/agpl/
diff --git a/licenses/apache.txt b/licenses/apache.txt
index a2c2d71..fd4bd0a 100644
--- a/licenses/apache.txt
+++ b/licenses/apache.txt
@@ -1,7 +1,6 @@
 ---
 title: Apache v2 License
 category: Apache
-slug: apache
 layout: license
 permalink: /licenses/apache/
 
diff --git a/licenses/artistic.txt b/licenses/artistic.txt
index e6fd215..b3dede4 100644
--- a/licenses/artistic.txt
+++ b/licenses/artistic.txt
@@ -2,7 +2,6 @@
 layout: license
 title: Artistic License 2.0
 category: Artistic
-slug: artistic
 permalink: /licenses/artistic/
 source: http://www.perlfoundation.org/attachment/legal/artistic-2_0.txt
 
diff --git a/licenses/bsd-3-clause.txt b/licenses/bsd-3-clause.txt
index 5fb4c75..61f4964 100644
--- a/licenses/bsd-3-clause.txt
+++ b/licenses/bsd-3-clause.txt
@@ -2,7 +2,7 @@
 layout: license
 title: BSD (3-Clause) License
 category: BSD
-slug: bsd-3
+tab-slug: bsd-3
 hide-from-license-list: true
 permalink: /licenses/bsd-3-clause/
 
diff --git a/licenses/bsd.txt b/licenses/bsd.txt
index 8edbb49..c6cfe1c 100644
--- a/licenses/bsd.txt
+++ b/licenses/bsd.txt
@@ -2,7 +2,7 @@
 layout: license
 title: BSD 2-Clause license
 category: BSD
-slug: bsd
+tab-slug: bsd
 hide-from-license-list: false
 permalink: /licenses/bsd/
 
diff --git a/licenses/cc0.txt b/licenses/cc0.txt
index 68699ce..b330b37 100644
--- a/licenses/cc0.txt
+++ b/licenses/cc0.txt
@@ -2,7 +2,7 @@
 layout: license
 title: CC0 1.0 Universal
 category: Public Domain Dedication
-slug: cc0
+tab-slug: cc0
 permalink: /licenses/cc0/
 class: license-types
 hide-from-license-list: true
diff --git a/licenses/eclipse.txt b/licenses/eclipse.txt
index 054b235..01c4c17 100644
--- a/licenses/eclipse.txt
+++ b/licenses/eclipse.txt
@@ -2,7 +2,6 @@
 layout: license
 title: Eclipse Public License v1.0
 category: Eclipse
-slug: eclipse
 permalink: /licenses/eclipse/
 
 description: This commercially-friendly copyleft license provides the ability to commercially license binaries; a modern royalty-free patent license grant; and the ability for linked works to use other licenses, including commercial ones.
diff --git a/licenses/gpl-v2.txt b/licenses/gpl-v2.txt
index 3a764a8..6bee8b7 100644
--- a/licenses/gpl-v2.txt
+++ b/licenses/gpl-v2.txt
@@ -1,7 +1,7 @@
 ---
 title: GPL v2
 category: GPL
-slug: gpl-v2
+tab-slug: gpl-v2
 hide-from-license-list: false
 layout: license
 permalink: /licenses/gpl-v2/
diff --git a/licenses/gpl-v3.txt b/licenses/gpl-v3.txt
index fa7db2b..510e4e9 100644
--- a/licenses/gpl-v3.txt
+++ b/licenses/gpl-v3.txt
@@ -1,7 +1,7 @@
 ---
 title: GPL v3
 category: GPL
-slug: gpl-v3
+tab-slug: gpl-v3
 hide-from-license-list: true
 layout: license
 permalink: /licenses/gpl-v3/
diff --git a/licenses/lgpl-v2.1.txt b/licenses/lgpl-v2.1.txt
index 442c6fc..13c4603 100644
--- a/licenses/lgpl-v2.1.txt
+++ b/licenses/lgpl-v2.1.txt
@@ -2,7 +2,7 @@
 layout: license
 title: LGPL v2.1
 category: LGPL
-slug: lgpl-v2.1
+tab-slug: lgpl-v2.1
 permalink: /licenses/lgpl-v2.1/
 source: http://www.gnu.org/licenses/lgpl-2.1.txt
 
diff --git a/licenses/lgpl-v3.txt b/licenses/lgpl-v3.txt
index 7982712..728f5f5 100644
--- a/licenses/lgpl-v3.txt
+++ b/licenses/lgpl-v3.txt
@@ -2,7 +2,7 @@
 layout: license
 title: LGPL v3
 category: LGPL
-slug: lgpl-v3
+tab-slug: lgpl-v3
 hide-from-license-list: true
 permalink: /licenses/lgpl-v3/
 source: http://www.gnu.org/licenses/lgpl-3.0.txt
diff --git a/licenses/mit.txt b/licenses/mit.txt
index fff3e51..7b0e212 100644
--- a/licenses/mit.txt
+++ b/licenses/mit.txt
@@ -2,7 +2,6 @@
 layout: license
 title: MIT License
 category: mit
-slug: mit
 permalink: /licenses/mit/
 source: http://opensource.org/licenses/MIT
 
diff --git a/licenses/mozilla.txt b/licenses/mozilla.txt
index 46990cb..5a7ee26 100644
--- a/licenses/mozilla.txt
+++ b/licenses/mozilla.txt
@@ -2,7 +2,6 @@
 layout: license
 title: Mozilla Public License Version 2.0
 category: Mozilla
-slug: mozilla
 permalink: /licenses/mozilla/
 source: http://www.mozilla.org/MPL/2.0/
 
diff --git a/licenses/no-license.html b/licenses/no-license.html
index f0b24ae..8455e23 100644
--- a/licenses/no-license.html
+++ b/licenses/no-license.html
@@ -2,7 +2,6 @@
 layout: license
 permalink: /licenses/no-license/
 category: No License
-slug: no-license
 class: license-types
 title: No License
 
diff --git a/licenses/unlicense.txt b/licenses/unlicense.txt
index d25cf8b..4af2e41 100644
--- a/licenses/unlicense.txt
+++ b/licenses/unlicense.txt
@@ -2,7 +2,7 @@
 layout: license
 title: The Unlicense
 category: Public Domain Dedication
-slug: unlicense
+tab-slug: unlicense
 permalink: /licenses/unlicense/
 class: license-types
 filename: UNLICENSE