diff --git a/pandora_server/lib/PandoraFMS/Core.pm b/pandora_server/lib/PandoraFMS/Core.pm
index 72bfe2f3c9..2b38349770 100644
--- a/pandora_server/lib/PandoraFMS/Core.pm
+++ b/pandora_server/lib/PandoraFMS/Core.pm
@@ -552,7 +552,7 @@ sub pandora_evaluate_alert ($$$$$$$;$$$$) {
 	}
 
 	my $schedule;
-	if (defined($alert->{'schedule'} && $alert->{'schedule'} != '')) {
+	if (defined($alert->{'schedule'}) && $alert->{'schedule'} != '') {
 		$schedule = PandoraFMS::Tools::p_decode_json($pa_config, $alert->{'schedule'});
 	}