diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 20346765..10865ad7 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -1964,7 +1964,7 @@ sub vmstatus {
 
 	if ($conf->{balloon}) {
 	    $d->{balloon_min} = $conf->{balloon}*(1024*1024);
-	    $d->{shares} = $conf->{shares} || 1000;
+	    $d->{shares} = defined($conf->{shares}) ? $conf->{shares} : 1000;
 	}
 
 	$d->{uptime} = 0;