diff --git a/core/class/helper.class.php b/core/class/helper.class.php
index e4c9aa59..cb72b5be 100644
--- a/core/class/helper.class.php
+++ b/core/class/helper.class.php
@@ -333,7 +333,6 @@ class helper {
 	 * @return string
 	 */
 	public static function filter($text, $filter) {
-		$text = trim($text);
 		switch($filter) {
 			case self::FILTER_BOOLEAN:
 				$text = (bool) $text;
diff --git a/core/core.php b/core/core.php
index 5bbd3828..a69f34aa 100644
--- a/core/core.php
+++ b/core/core.php
@@ -767,7 +767,7 @@ class common {
 			}
 		}
 		// Sinon retourne null
-		return helper::filter(null, $filter);
+		return null;
 	}
 
 	/**