diff --git a/importexport/inc/class.importexport_export_csv.inc.php b/importexport/inc/class.importexport_export_csv.inc.php
index 2cbc0106a4..6c758275cf 100644
--- a/importexport/inc/class.importexport_export_csv.inc.php
+++ b/importexport/inc/class.importexport_export_csv.inc.php
@@ -359,7 +359,7 @@ class importexport_export_csv implements importexport_iface_export_record
 			}
 		}
 		foreach((array)$fields['select-bool'] as $name) {
-			if($record->$name != null) {
+			if($record->$name !== null) {
 				$record->$name = $record->$name ? lang('Yes') : lang('No');
 			}
 		}