diff --git a/pandora_server/lib/PandoraFMS/DB.pm b/pandora_server/lib/PandoraFMS/DB.pm
index ae07c49c96..6756178563 100644
--- a/pandora_server/lib/PandoraFMS/DB.pm
+++ b/pandora_server/lib/PandoraFMS/DB.pm
@@ -1365,6 +1365,8 @@ sub db_concat ($$) {
 ########################################################################
 sub get_priority_name ($) {
 	my ($priority_id) = @_;
+
+	return '' unless defined($priority_id);
 	
 	if ($priority_id == 0) {
 		return 'Maintenance';