diff --git a/classes/Translate.php b/classes/Translate.php
index 85c847558..cfe1faed5 100644
--- a/classes/Translate.php
+++ b/classes/Translate.php
@@ -158,10 +158,6 @@ class TranslateCore
 			if ($_MODULES == null)
 				return str_replace('"', '"', $string);
 
-			// set array key to lowercase for 1.3 compatibility
-			if (version_compare(_PS_VERSION_, '1.3.0.0') <= 0)
-				$_MODULES = array_change_key_case($_MODULES);
-
 			$currentKey = strtolower('<{'.$name.'}'._THEME_NAME_.'>'.$source.'_'.$key);
 			$defaultKey = strtolower('<{'.$name.'}prestashop>'.$source.'_'.$key);