diff --git a/application/controllers/ComptageController.php b/application/controllers/ComptageController.php
index 2c05d3c1..e7aee9b3 100644
--- a/application/controllers/ComptageController.php
+++ b/application/controllers/ComptageController.php
@@ -12,8 +12,14 @@ class ComptageController extends Zend_Controller_Action
 		
 		$request	= $this->getRequest();
 		$key		= $request->getParam('cle');
+		$valeur		= $request->getParam('valeur');
 		
-		$session->setCritere($key, $request->getParam('valeur'));
+		$sessionValeur = $session->getCritere($key);
+		if(!empty($sessionValeur) and empty($valeur)) {
+			$session->unsetCritere($key);
+		} else {
+			$session->setCritere($key, $valeur);
+		}
 		
 		$auth = Zend_Auth::getInstance();
 		$user = $auth->getIdentity();