diff --git a/SeedDMS_Core/Core/inc.ClassUser.php b/SeedDMS_Core/Core/inc.ClassUser.php
index 4d1ba803e..8782ef0f1 100644
--- a/SeedDMS_Core/Core/inc.ClassUser.php
+++ b/SeedDMS_Core/Core/inc.ClassUser.php
@@ -620,6 +620,11 @@ class SeedDMS_Core_User { /* {{{ */
 	 * @return bool
 	 */
 	function setQuota($quota) { /* {{{ */
+		if (!is_numeric($quota))
+			return false;
+		if($quota < 0)
+			return false;
+
 		$db = $this->_dms->getDB();
 
 		$quota = intval($quota);