diff --git a/application/query.class.inc.php b/application/query.class.inc.php
index d32448135..dd1febc25 100644
--- a/application/query.class.inc.php
+++ b/application/query.class.inc.php
@@ -139,7 +139,7 @@ abstract class Query extends cmdbAbstractObject
 	 * @return string|null
 	 * @since 3.1.0
 	 */
-	public abstract function GetExportUrl(array $aValues = null) : ?string;
+	abstract public function GetExportUrl(array $aValues = null) : ?string;
 
 	/**
 	 * Update last export information.
diff --git a/webservices/export.php b/webservices/export.php
index b7ae5735f..b697f8fe4 100644
--- a/webservices/export.php
+++ b/webservices/export.php
@@ -87,6 +87,8 @@ $sExpression = utils::ReadParam('expression', '', true /* Allow CLI */, 'raw_dat
 $sFields = trim(utils::ReadParam('fields', '', true, 'raw_data')); // CSV field list (allows to specify link set attributes, still not taken into account for XML export)
 $bFieldsAdvanced = utils::ReadParam('fields_advanced', 0);
 
+$oQuery = null;
+
 if (strlen($sExpression) == 0)
 {
 	$sQueryId = trim(utils::ReadParam('query', '', true /* Allow CLI */, 'raw_data'));