diff --git a/templates/bootstrap-fieldgroup-nav.tpl.php b/templates/bootstrap-fieldgroup-nav.tpl.php
index b41b3cb..d91212f 100644
--- a/templates/bootstrap-fieldgroup-nav.tpl.php
+++ b/templates/bootstrap-fieldgroup-nav.tpl.php
@@ -23,7 +23,7 @@
     <?php if ($flip) : ?>
       <div class="tab-content <?php print $pane_classes; ?>">
         <?php foreach ($panes as $index => $pane) : ?>
-          <div id="<?php print $pane['id']; ?>" class="tab-pane <?php if ($index === $active) print 'active'; ?>">
+          <div id="<?php print $pane['id']; ?>" class="tab-pane fade <?php if ($index === $active) print 'in active'; ?>">
             <?php print $pane['content']; ?>
           </div>
         <?php endforeach; ?>
@@ -43,7 +43,7 @@
     <?php if (!$flip) : ?>
       <div class="tab-content <?php print $pane_classes; ?>">
         <?php foreach ($panes as $index => $pane) : ?>
-          <div id="<?php print $pane['id']; ?>" class="tab-pane <?php if ($index === $active) print 'active'; ?>">
+          <div id="<?php print $pane['id']; ?>" class="tab-pane fade <?php if ($index === $active) print 'in active'; ?>">
             <?php print $pane['content']; ?>
           </div>
         <?php endforeach; ?>