diff --git a/htdocs/hrm/skill_tab.php b/htdocs/hrm/skill_tab.php
index 5e4b33345b7..355374b6d7c 100644
--- a/htdocs/hrm/skill_tab.php
+++ b/htdocs/hrm/skill_tab.php
@@ -178,7 +178,7 @@ if (empty($reshook)) {
 	} else if ($action == 'saveSkill') {
 		if (!empty($TNote)) {
 			foreach ($TNote as $skillId => $rank) {
-				$TSkills = $skill->fetchAll('ASC', 't.rowid', 0, 0, array('customsql' => 'fk_object=' . $id . " AND objecttype='" . $objecttype . "' AND fk_skill = " . $skillId));
+				$TSkills = $skill->fetchAll('ASC', 't.rowid', 0, 0, array('customsql' => 'fk_object=' . $id . " AND objecttype='" . $objecttype . "' AND fk_skill = " . ((int) $skillId)));
 				if (is_array($TSkills) && !empty($TSkills)) {
 					foreach ($TSkills as $tmpObj) {
 						$tmpObj->rank = $rank;