diff --git a/config/config.inc.php b/config/config.inc.php
index 80d31e32a..9e1213239 100644
--- a/config/config.inc.php
+++ b/config/config.inc.php
@@ -26,8 +26,17 @@
 */
 
 /* Debug only */
-@ini_set('display_errors', 'on');
-define('_PS_DEBUG_SQL_', true);
+define('_PS_MODE_DEV_', true);
+if (_PS_MODE_DEV_)
+{
+	@ini_set('display_errors', 'on');	
+	define('_PS_DEBUG_SQL_', true);
+}
+else
+{
+	@ini_set('display_errors', 'off');
+	define('_PS_DEBUG_SQL_', false);
+}
 
 $start_time = microtime(true);
 
@@ -184,4 +193,4 @@ define('_PS_OS_WS_PAYMENT_', Configuration::get('PS_OS_WS_PAYMENT'));
 
 /* Get smarty */
 require_once(dirname(__FILE__).'/smarty.config.inc.php');
-Context::getContext()->smarty = $smarty;
\ No newline at end of file
+Context::getContext()->smarty = $smarty;
diff --git a/config/defines.inc.php b/config/defines.inc.php
index eda5ae15e..6bb0406fc 100755
--- a/config/defines.inc.php
+++ b/config/defines.inc.php
@@ -25,7 +25,6 @@
 *  International Registered Trademark & Property of PrestaShop SA
 */
 
-define('_PS_MODE_DEV_', true);
 define('_PS_DEBUG_PROFILING_', false);
 define('_PS_MODE_DEMO_', false);