diff --git a/htdocs/hrm/class/skillrank.class.php b/htdocs/hrm/class/skillrank.class.php
index aa1d70b430f..51768171049 100644
--- a/htdocs/hrm/class/skillrank.class.php
+++ b/htdocs/hrm/class/skillrank.class.php
@@ -414,15 +414,15 @@ class SkillRank extends CommonObject
 		if (count($filter) > 0) {
 			foreach ($filter as $key => $value) {
 				if ($key == 't.rowid') {
-					$sqlwhere[] = $key.'='.$value;
-				} elseif (in_array($this->fields[$key]['type'], array('date', 'datetime', 'timestamp'))) {
-					$sqlwhere[] = $key.' = \''.$this->db->idate($value).'\'';
+					$sqlwhere[] = $key." = ".((int) $value);
+				} elseif ($key != 'customsql' && in_array($this->fields[$key]['type'], array('date', 'datetime', 'timestamp'))) {
+					$sqlwhere[] = $key." = '".$this->db->idate($value)."'";
 				} elseif ($key == 'customsql') {
 					$sqlwhere[] = $value;
 				} elseif (strpos($value, '%') === false) {
-					$sqlwhere[] = $key.' IN ('.$this->db->sanitize($this->db->escape($value)).')';
+					$sqlwhere[] = $key." IN (".$this->db->sanitize($this->db->escape($value)).")";
 				} else {
-					$sqlwhere[] = $key.' LIKE \'%'.$this->db->escape($value).'%\'';
+					$sqlwhere[] = $key." LIKE '%".$this->db->escape($value)."%'";
 				}
 			}
 		}