diff --git a/admin/include/functions_install.inc.php b/admin/include/functions_install.inc.php
index e564311b2..5eb251da7 100644
--- a/admin/include/functions_install.inc.php
+++ b/admin/include/functions_install.inc.php
@@ -134,7 +134,7 @@ function activate_core_themes()
   $themes = new themes();
   foreach ($themes->fs_themes as $theme_id => $fs_theme)
   {
-    if (in_array($theme_id, array('Sylvia', 'clear', 'dark')))
+    if (in_array($theme_id, array('Sylvia', 'clear', 'dark', 'smartpocket')))
     {
       $themes->perform_action('activate', $theme_id);
     }
diff --git a/admin/themes/default/template/themes_installed.tpl b/admin/themes/default/template/themes_installed.tpl
index 57df78a79..82d57a439 100644
--- a/admin/themes/default/template/themes_installed.tpl
+++ b/admin/themes/default/template/themes_installed.tpl
@@ -17,7 +17,7 @@ jQuery(document).ready(function() {
 <div class="themeBoxes">
 {foreach from=$active_themes item=theme}
   <div class="themeBox{if $theme.is_default} themeDefault{/if}">
-    <div class="themeName">{$theme.name}{if $theme.is_default} <em>({'default'|@translate})</em>{/if} {if $theme.mobile} <em>({'mobile'|@translate})</em>{/if}</div>
+    <div class="themeName">{$theme.name}{if $theme.is_default} <em>({'default'|@translate})</em>{/if} {if $theme.mobile} <em>({'Mobile'|@translate})</em>{/if}</div>
     <div class="themeShot"><a href="{$theme.screenshot}" class="preview-box" title="{$theme.name}"><img src="{$theme.screenshot}" alt=""></a></div>
     <div class="themeActions">
       <div>
@@ -47,7 +47,7 @@ jQuery(document).ready(function() {
 <div class="themeBoxes">
 {foreach from=$inactive_themes item=theme}
   <div class="themeBox">
-    <div class="themeName">{$theme.name}{if $theme.mobile} <em>({'mobile'|@translate})</em>{/if}</div>
+    <div class="themeName">{$theme.name}{if $theme.mobile} <em>({'Mobile'|@translate})</em>{/if}</div>
     <div class="themeShot"><a href="{$theme.screenshot}" class="preview-box" title="{$theme.name}"><img src="{$theme.screenshot}" alt=""></a></div>
     <div class="themeActions">
       <div>
diff --git a/include/functions.inc.php b/include/functions.inc.php
index e1f74baf8..5b05452c0 100644
--- a/include/functions.inc.php
+++ b/include/functions.inc.php
@@ -757,7 +757,7 @@ function url_is_remote($url)
 /**
  * returns available themes
  */
-function get_pwg_themes()
+function get_pwg_themes($show_mobile=false)
 {
   global $conf;
 
@@ -773,6 +773,14 @@ SELECT
   $result = pwg_query($query);
   while ($row = pwg_db_fetch_assoc($result))
   {
+    if ($row['id'] == $conf['mobile_theme'])
+    {
+      if (!$show_mobile)
+      {
+        continue;
+      }
+      $row['name'] .= ' ('.l10n('Mobile').')';
+    }
     if (check_theme_installed($row['id']))
     {
       $themes[ $row['id'] ] = $row['name'];
diff --git a/install/config.sql b/install/config.sql
index 10be8a188..f4e7ce7eb 100644
--- a/install/config.sql
+++ b/install/config.sql
@@ -73,3 +73,4 @@ INSERT INTO piwigo_config (param,value) VALUES ('original_resize','false');
 INSERT INTO piwigo_config (param,value) VALUES ('original_resize_maxwidth','2016');
 INSERT INTO piwigo_config (param,value) VALUES ('original_resize_maxheight','2016');
 INSERT INTO piwigo_config (param,value) VALUES ('original_resize_quality','95');
+INSERT INTO piwigo_config (param,value) VALUES ('mobile_theme',null);
diff --git a/install/db/118-database.php b/install/db/118-database.php
new file mode 100644
index 000000000..7cd9bc504
--- /dev/null
+++ b/install/db/118-database.php
@@ -0,0 +1,38 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based photo gallery                                    |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2012 Piwigo Team                  http://piwigo.org |
+// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
+// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
+// +-----------------------------------------------------------------------+
+// | This program is free software; you can redistribute it and/or modify  |
+// | it under the terms of the GNU General Public License as published by  |
+// | the Free Software Foundation                                          |
+// |                                                                       |
+// | This program is distributed in the hope that it will be useful, but   |
+// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
+// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
+// | General Public License for more details.                              |
+// |                                                                       |
+// | You should have received a copy of the GNU General Public License     |
+// | along with this program; if not, write to the Free Software           |
+// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
+// | USA.                                                                  |
+// +-----------------------------------------------------------------------+
+
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+$upgrade_description = 'Automatically activate mobile theme.';
+
+conf_update_param('mobile_theme', 'smartpocket');
+
+echo
+"\n"
+. $upgrade_description
+."\n"
+;
+?>
\ No newline at end of file
diff --git a/plugins/LocalFilesEditor/include/css.inc.php b/plugins/LocalFilesEditor/include/css.inc.php
index 7fa129049..15e434582 100644
--- a/plugins/LocalFilesEditor/include/css.inc.php
+++ b/plugins/LocalFilesEditor/include/css.inc.php
@@ -10,7 +10,7 @@ elseif (isset($_POST['edited_file']))
 {
   $edited_file = $_POST['edited_file'];
 }
-elseif (isset($_GET['theme']) and in_array($_GET['theme'], array_keys(get_pwg_themes())))
+elseif (isset($_GET['theme']) and in_array($_GET['theme'], array_keys(get_pwg_themes(true))))
 {
   $edited_file = PHPWG_ROOT_PATH.PWG_LOCAL_DIR . 'css/'.$_GET['theme'].'-rules.css';
 }