diff --git a/src/PVE/Storage/LVMPlugin.pm b/src/PVE/Storage/LVMPlugin.pm
index 7044c4f..6d57097 100644
--- a/src/PVE/Storage/LVMPlugin.pm
+++ b/src/PVE/Storage/LVMPlugin.pm
@@ -930,8 +930,12 @@ sub volume_resize {
 
 sub volume_size_info {
     my ($class, $scfg, $storeid, $volname, $timeout) = @_;
+
+    my ($format) = ($class->parse_volname($volname))[6];
     my $path = $class->filesystem_path($scfg, $volname);
 
+    return PVE::Storage::Plugin::file_size_info($path, $timeout, $format) if $format eq 'qcow2';
+
     my $cmd = [
         '/sbin/lvs',
         '--separator',