diff --git a/htdocs/includes/modules/societe/mod_codeclient_monkey.php b/htdocs/includes/modules/societe/mod_codeclient_monkey.php
index 5c2249bcf2b..f305f9fd5be 100644
--- a/htdocs/includes/modules/societe/mod_codeclient_monkey.php
+++ b/htdocs/includes/modules/societe/mod_codeclient_monkey.php
@@ -109,7 +109,7 @@ class mod_codeclient_monkey extends ModeleThirdPartyCode
 		$posindice=8;
 		$sql = "SELECT MAX(SUBSTRING(".$field.",".$posindice.")) as max";
 		$sql.= " FROM ".MAIN_DB_PREFIX."societe";
-		$sql.= " WHERE ".$field." LIKE '".$prefix."%'";
+		$sql.= " WHERE ".$field." LIKE '".$prefix."____-%'";
 
 		$resql=$db->query($sql);
 		if ($resql)