diff --git a/PVE/Storage/ISCSIDirectPlugin.pm b/PVE/Storage/ISCSIDirectPlugin.pm
index 82c6879..0267a22 100644
--- a/PVE/Storage/ISCSIDirectPlugin.pm
+++ b/PVE/Storage/ISCSIDirectPlugin.pm
@@ -193,4 +193,9 @@ sub volume_resize {
     die "volume resize is not possible on iscsi device";
 }
 
+sub volume_snapshot {
+    my ($class, $scfg, $storeid, $volname, $snap, $running) = @_;
+    die "volume snapshot is not possible on iscsi device";
+}
+
 1;