diff --git a/htdocs/adherents/class/adherent_type.class.php b/htdocs/adherents/class/adherent_type.class.php
index 2ffc1e2c9fd..0104f8f36e8 100644
--- a/htdocs/adherents/class/adherent_type.class.php
+++ b/htdocs/adherents/class/adherent_type.class.php
@@ -366,7 +366,7 @@ class AdherentType extends CommonObject
 		$sql .= "libelle = '".$this->db->escape($this->label)."',";
 		$sql .= "morphy = '".$this->db->escape($this->morphy)."',";
 		$sql .= "subscription = '".$this->db->escape($this->subscription)."',";
-		$sql .= "amount = '".$this->db->escape($this->amount)."',";
+		$sql .= "amount = ".((empty($this->amount) && $this->amount == '') ? 'null' : ((float) $this->amount)).",";
 		$sql .= "duration = '".$this->db->escape($this->duration_value.$this->duration_unit)."',";
 		$sql .= "note = '".$this->db->escape($this->note)."',";
 		$sql .= "vote = ".(integer) $this->db->escape($this->vote).",";
diff --git a/htdocs/adherents/stats/index.php b/htdocs/adherents/stats/index.php
index 11c0025dcc5..e820d0a0d23 100644
--- a/htdocs/adherents/stats/index.php
+++ b/htdocs/adherents/stats/index.php
@@ -198,8 +198,8 @@ foreach ($data as $val) {
 	//print '</a>';
 	print '</td>';
 	print '<td class="right">'.$val['nb'].'</td>';
-	print '<td class="right">'.price(price2num($val['total'], 'MT'), 1).'</td>';
-	print '<td class="right">'.price(price2num($val['avg'], 'MT'), 1).'</td>';
+	print '<td class="right"><span class="amount">'.price(price2num($val['total'], 'MT'), 1).'</span></td>';
+	print '<td class="right"><span class="amount">'.price(price2num($val['avg'], 'MT'), 1).'</span></td>';
 	print '</tr>';
 	$oldyear = $year;
 }
diff --git a/htdocs/adherents/type.php b/htdocs/adherents/type.php
index 6c4f63725e1..033592a9afc 100644
--- a/htdocs/adherents/type.php
+++ b/htdocs/adherents/type.php
@@ -71,7 +71,7 @@ $label = GETPOST("label", "alpha");
 $morphy = GETPOST("morphy", "alpha");
 $status = GETPOST("status", "int");
 $subscription = GETPOST("subscription", "int");
-$amount = price2num(GETPOST('amount', 'alpha'), 'MT');
+$amount = GETPOST('amount', 'alpha');
 $duration_value = GETPOST('duration_value', 'int');
 $duration_unit = GETPOST('duration_unit', 'alpha');
 $vote = GETPOST("vote", "int");
@@ -119,7 +119,7 @@ if ($action == 'add' && $user->rights->adherent->configurer) {
 	$object->morphy = trim($morphy);
 	$object->status = (int) $status;
 	$object->subscription = (int) $subscription;
-	$object->amount = $amount;
+	$object->amount = ($amount == '' ? '' : price2num($amount, 'MT'));
 	$object->duration_value = $duration_value;
 	$object->duration_unit = $duration_unit;
 	$object->note = trim($comment);
@@ -166,12 +166,11 @@ if ($action == 'update' && $user->rights->adherent->configurer) {
 	$object->fetch($rowid);
 
 	$object->oldcopy = clone $object;
-
 	$object->label= trim($label);
 	$object->morphy	= trim($morphy);
 	$object->status	= (int) $status;
 	$object->subscription = (int) $subscription;
-	$object->amount = $amount;
+	$object->amount = ($amount == '' ? '' : price2num($amount, 'MT'));;
 	$object->duration_value = $duration_value;
 	$object->duration_unit = $duration_unit;
 	$object->note = trim($comment);
@@ -306,7 +305,7 @@ if (!$rowid && $action != 'create' && $action != 'edit') {
 			}
 			print '</td>';
 			print '<td class="center">'.yn($objp->subscription).'</td>';
-			print '<td class="center">'.price($objp->amount).'</td>';
+			print '<td class="center"><span class="amount">'.(is_null($objp->amount) || $objp->amount === '' ? '' : price($objp->amount)).'</span></td>';
 			print '<td class="center">'.yn($objp->vote).'</td>';
 			print '<td class="center">'.$membertype->getLibStatut(5).'</td>';
 			if ($user->rights->adherent->configurer) {
@@ -446,7 +445,7 @@ if ($rowid > 0) {
 		print '</tr>';
 
 		print '<tr><td class="titlefield">'.$langs->trans("Amount").'</td><td>';
-		print price($object->amount);
+		print ((is_null($object->amount) || $object->amount === '') ? '' : price($object->amount));
 		print '</tr>';
 
 		print '<tr><td>'.$langs->trans("VoteAllowed").'</td><td>';
@@ -594,24 +593,24 @@ if ($rowid > 0) {
 				$titre .= " (".$membertype->label.")";
 			}
 
-			$param = "&rowid=".$object->id;
+			$param = "&rowid=".urlencode($object->id);
 			if (!empty($status)) {
-				$param .= "&status=".$status;
+				$param .= "&status=".urlencode($status);
 			}
 			if (!empty($search_lastname)) {
-				$param .= "&search_lastname=".$search_lastname;
+				$param .= "&search_lastname=".urlencode($search_lastname);
 			}
 			if (!empty($search_firstname)) {
-				$param .= "&search_firstname=".$search_firstname;
+				$param .= "&search_firstname=".urlencode($search_firstname);
 			}
 			if (!empty($search_login)) {
-				$param .= "&search_login=".$search_login;
+				$param .= "&search_login=".urlencode($search_login);
 			}
 			if (!empty($search_email)) {
-				$param .= "&search_email=".$search_email;
+				$param .= "&search_email=".urlencode($search_email);
 			}
 			if (!empty($filter)) {
-				$param .= "&filter=".$filter;
+				$param .= "&filter=".urlencode($filter);
 			}
 
 			if ($sall) {
@@ -797,7 +796,9 @@ if ($rowid > 0) {
 		print '</td></tr>';
 
 		print '<tr><td>'.$langs->trans("Amount").'</td><td>';
-		print '<input name="amount" size="5" value="'.price($object->amount).'">';
+		print '<input name="amount" size="5" value="';
+		print ((is_null($object->amount) || $object->amount === '') ? '' : price($object->amount));
+		print '">';
 		print '</td></tr>';
 
 		print '<tr><td>'.$langs->trans("VoteAllowed").'</td><td>';