diff --git a/htdocs/expensereport/class/expensereportstats.class.php b/htdocs/expensereport/class/expensereportstats.class.php
index 9345e3e42ef..9c614e4953c 100644
--- a/htdocs/expensereport/class/expensereportstats.class.php
+++ b/htdocs/expensereport/class/expensereportstats.class.php
@@ -42,6 +42,9 @@ class ExpenseReportStats extends Stats
     public $field;
     public $where;
 
+    private $datetouse = 'date_valid';
+
+
 	/**
 	 * Constructor
 	 *
@@ -91,7 +94,7 @@ class ExpenseReportStats extends Stats
 	 */
 	public function getNbByYear()
 	{
-		$sql = "SELECT YEAR(".$this->db->ifsql('e.date_valid IS NULL', 'e.date_create', 'e.date_valid').") as dm, count(*)";
+		$sql = "SELECT YEAR(".$this->db->ifsql('e.'.$this->datetouse.' IS NULL', 'e.date_create', 'e.'.$this->datetouse).") as dm, count(*)";
 		$sql.= " FROM ".$this->from;
 		$sql.= " GROUP BY dm DESC";
 		$sql.= " WHERE ".$this->where;
@@ -109,9 +112,9 @@ class ExpenseReportStats extends Stats
 	 */
 	public function getNbByMonth($year, $format = 0)
 	{
-		$sql = "SELECT MONTH(".$this->db->ifsql('e.date_valid IS NULL', 'e.date_create', 'e.date_valid').") as dm, count(*)";
+		$sql = "SELECT MONTH(".$this->db->ifsql('e.'.$this->datetouse.' IS NULL', 'e.date_create', 'e.'.$this->datetouse).") as dm, count(*)";
 		$sql.= " FROM ".$this->from;
-		$sql.= " WHERE YEAR(e.date_valid) = ".$year;
+		$sql.= " WHERE YEAR(e.".$this->datetouse.") = ".$year;
 		$sql.= " AND ".$this->where;
 		$sql.= " GROUP BY dm";
         $sql.= $this->db->order('dm', 'DESC');
@@ -131,9 +134,9 @@ class ExpenseReportStats extends Stats
 	 */
 	public function getAmountByMonth($year, $format = 0)
 	{
-		$sql = "SELECT date_format(".$this->db->ifsql('e.date_valid IS NULL', 'e.date_create', 'e.date_valid').",'%m') as dm, sum(".$this->field.")";
+		$sql = "SELECT date_format(".$this->db->ifsql('e.'.$this->datetouse.' IS NULL', 'e.date_create', 'e.'.$this->datetouse).",'%m') as dm, sum(".$this->field.")";
 		$sql.= " FROM ".$this->from;
-		$sql.= " WHERE date_format(".$this->db->ifsql('e.date_valid IS NULL', 'e.date_create', 'e.date_valid').",'%Y') = '".$year."'";
+		$sql.= " WHERE date_format(".$this->db->ifsql('e.'.$this->datetouse.' IS NULL', 'e.date_create', 'e.'.$this->datetouse).",'%Y') = '".$year."'";
 		$sql.= " AND ".$this->where;
 		$sql.= " GROUP BY dm";
 		$sql.= $this->db->order('dm', 'DESC');
@@ -151,9 +154,9 @@ class ExpenseReportStats extends Stats
 	 */
 	public function getAverageByMonth($year)
 	{
-		$sql = "SELECT date_format(".$this->db->ifsql('e.date_valid IS NULL', 'e.date_create', 'e.date_valid').",'%m') as dm, avg(".$this->field.")";
+		$sql = "SELECT date_format(".$this->db->ifsql('e.'.$this->datetouse.' IS NULL', 'e.date_create', 'e.'.$this->datetouse).",'%m') as dm, avg(".$this->field.")";
 		$sql.= " FROM ".$this->from;
-		$sql.= " WHERE date_format(".$this->db->ifsql('e.date_valid IS NULL', 'e.date_create', 'e.date_valid').",'%Y') = '".$year."'";
+		$sql.= " WHERE date_format(".$this->db->ifsql('e.'.$this->datetouse.' IS NULL', 'e.date_create', 'e.'.$this->datetouse).",'%Y') = '".$year."'";
 		$sql.= " AND ".$this->where;
 		$sql.= " GROUP BY dm";
         $sql.= $this->db->order('dm', 'DESC');
@@ -168,7 +171,7 @@ class ExpenseReportStats extends Stats
 	 */
 	public function getAllByYear()
 	{
-		$sql = "SELECT date_format(".$this->db->ifsql('e.date_valid IS NULL', 'e.date_create', 'e.date_valid').",'%Y') as year, count(*) as nb, sum(".$this->field.") as total, avg(".$this->field.") as avg";
+		$sql = "SELECT date_format(".$this->db->ifsql('e.'.$this->datetouse.' IS NULL', 'e.date_create', 'e.'.$this->datetouse).",'%Y') as year, count(*) as nb, sum(".$this->field.") as total, avg(".$this->field.") as avg";
 		$sql.= " FROM ".$this->from;
 		$sql.= " WHERE ".$this->where;
 		$sql.= " GROUP BY year";
diff --git a/htdocs/expensereport/stats/index.php b/htdocs/expensereport/stats/index.php
index 12959e7946f..60ab9001972 100644
--- a/htdocs/expensereport/stats/index.php
+++ b/htdocs/expensereport/stats/index.php
@@ -232,7 +232,9 @@ $liststatus = $tmpexpensereport->statuts;
 print $form->selectarray('object_status', $liststatus, GETPOST('object_status', 'int'), -4, 0, 0, '', 1);
 print '</td></tr>';
 // Year
-print '<tr><td>'.$langs->trans("Year").'</td><td>';
+print '<tr><td>';
+print $form->textwithpicto($langs->trans("Year"), $langs->trans("DateValidation"));
+print '</td><td>';
 if (!in_array($year, $arrayyears)) $arrayyears[$year] = $year;
 arsort($arrayyears);
 print $form->selectarray('year', $arrayyears, $year, 0);