diff --git a/app/code/community/Nexcessnet/Turpentine/Model/Varnish/Configurator/Abstract.php b/app/code/community/Nexcessnet/Turpentine/Model/Varnish/Configurator/Abstract.php
index ff007c489..2ad709ca1 100644
--- a/app/code/community/Nexcessnet/Turpentine/Model/Varnish/Configurator/Abstract.php
+++ b/app/code/community/Nexcessnet/Turpentine/Model/Varnish/Configurator/Abstract.php
@@ -808,18 +808,23 @@ protected function _vcl_acl($name, array $hosts) {
      * @return string
      */
     protected function _vcl_sub_normalize_user_agent() {
-        /**
-         * Mobile regex from
-         * @link http://magebase.com/magento-tutorials/magento-design-exceptions-explained/
-         */
+
+        $mobileRegexp = $this->_getMobileUserAgentRegex();
         $tpl = <<<EOS
-if (req.http.User-Agent ~ "iP(?:hone|ad|od)|BlackBerry|Palm|Googlebot-Mobile|Mobile|mobile|mobi|Windows Mobile|Safari Mobile|Android|Opera (?:Mini|Mobi)") {
+set req.http.X-Normalized-User-Agent = "other";
+EOS;
+        if(!empty($mobileRegexp)){
+            $tplContent = '
+            if (req.http.User-Agent ~ "'.$mobileRegexp.'") {
         set req.http.X-Normalized-User-Agent = "mobile";
-    } else {
-        set req.http.X-Normalized-User-Agent = "other";
-    }
+    }';
 
+            $tpl .= <<<"EOS"
+$tplContent
 EOS;
+
+        }
+
         return $tpl;
     }
 
@@ -879,6 +884,16 @@ protected function _getNormalizeCookieRegex() {
             'turpentine_vcl/normalization/cookie_regex' ));
     }
 
+    /**
+     * Get the regex for mobile user agent
+     *
+     * @return string
+     */
+    protected function _getMobileUserAgentRegex() {
+        return trim(Mage::getStoreConfig(
+            'turpentine_vcl/normalization/user_agent_mobile_regexp' ));
+    }
+
     /**
      * Get the allowed IPs when in maintenance mode
      *
@@ -1157,7 +1172,7 @@ protected function _getTemplateVars() {
         if (Mage::getStoreConfig('turpentine_varnish/general/https_proto_fix')) {
             $vars['https_proto_fix'] = $this->_vcl_sub_https_proto_fix();
         }
-        
+
         if (Mage::getStoreConfig('turpentine_varnish/general/https_redirect_fix')) {
             $vars['https_redirect'] = $this->_vcl_sub_https_redirect_fix();
             if (Mage::getStoreConfig('turpentine_varnish/servers/version') == '4.0' || Mage::getStoreConfig('turpentine_varnish/servers/version') == '4.1') {
diff --git a/app/code/community/Nexcessnet/Turpentine/etc/config.xml b/app/code/community/Nexcessnet/Turpentine/etc/config.xml
index 3e53e68af..9fc74ce3c 100644
--- a/app/code/community/Nexcessnet/Turpentine/etc/config.xml
+++ b/app/code/community/Nexcessnet/Turpentine/etc/config.xml
@@ -72,6 +72,7 @@
             <normalization>
                 <encoding>1</encoding>
                 <user_agent>0</user_agent>
+                <user_agent_mobile_regexp><![CDATA[iP(?:hone|ad|od)|BlackBerry|Palm|Googlebot-Mobile|Mobile|mobile|mobi|Windows Mobile|Safari Mobile|Android|Opera (?:Mini|Mobi)]]></user_agent_mobile_regexp>
                 <host>0</host>
             </normalization>
             <ttls>
diff --git a/app/code/community/Nexcessnet/Turpentine/etc/system.xml b/app/code/community/Nexcessnet/Turpentine/etc/system.xml
index 4ac2c8947..114ad9653 100644
--- a/app/code/community/Nexcessnet/Turpentine/etc/system.xml
+++ b/app/code/community/Nexcessnet/Turpentine/etc/system.xml
@@ -507,6 +507,18 @@
                             <show_in_website>0</show_in_website>
                             <show_in_store>0</show_in_store>
                         </user_agent>
+                        <user_agent_mobile_regexp translate="label" module="turpentine">
+                            <label>Regexp for Mobile User-Agent</label>
+                            <comment><![CDATA[See for example http://magebase.com/magento-tutorials/magento-design-exceptions-explained/]]></comment>
+                            <frontend_type>text</frontend_type>
+                            <sort_order>25</sort_order>
+                            <show_in_default>1</show_in_default>
+                            <show_in_website>0</show_in_website>
+                            <show_in_store>0</show_in_store>
+                            <depends>
+                                <user_agent>1</user_agent>
+                            </depends>
+                        </user_agent_mobile_regexp>
                         <host translate="label" module="turpentine">
                             <label>Normalize Host</label>
                             <comment>Force requests to be for a specific domain name, will probably break most multi-store setups</comment>