diff --git a/htdocs/core/lib/public.lib.php b/htdocs/core/lib/public.lib.php
index ecc75de10da..0ce710517de 100644
--- a/htdocs/core/lib/public.lib.php
+++ b/htdocs/core/lib/public.lib.php
@@ -30,11 +30,11 @@ require_once DOL_DOCUMENT_ROOT . '/core/lib/date.lib.php';
 require_once DOL_DOCUMENT_ROOT . '/core/lib/functions.lib.php';
 
 /**
- * Check if the object exceeded the number of posts for a specific ip
- * @param  object    $object         Object to check
- * @param  int       $nb_post_max    Number max of posts
+ * Check if the object exceeded the number of posts for a specific ip in the same week
  *
- * @return int       return <0 if error, >0 if OK
+ * @param  object    $object        Object to check
+ * @param  int       $nb_post_max   Number max of posts
+ * @return int       				Return <0 if error, >0 if OK
  */
 function checkNbPostsForASpeceificIp($object, $nb_post_max)
 {
@@ -42,7 +42,7 @@ function checkNbPostsForASpeceificIp($object, $nb_post_max)
 
 	$nb_post_ip = 0;
 	$now = dol_now();
-	$minmonthpost = dol_time_plus_duree($now, -1, "m");
+	$minmonthpost = dol_time_plus_duree($now, -1, "w");
 
 	if (empty($object->ip)) {
 		$object->ip = getUserRemoteIP();