diff --git a/PVE/QemuMigrate.pm b/PVE/QemuMigrate.pm
index 61c5629c..af849d35 100644
--- a/PVE/QemuMigrate.pm
+++ b/PVE/QemuMigrate.pm
@@ -246,10 +246,10 @@ sub sync_disks {
 	    die "can't migrate '$volid' - storagy type '$scfg->{type}' not supported\n"
 		if $scfg->{type} ne 'dir';
 
-	    #if file, check if a backing file exist
-	    if(($scfg->{type} eq 'dir') && (!$sharedvm)){
+	    # if file, check if a backing file exist
+	    if (($scfg->{type} eq 'dir') && (!$sharedvm)) {
 		my (undef, undef, undef, $parent) = PVE::Storage::volume_size_info($self->{storecfg}, $volid, 1);
-		die "can't migrate '$volid' as it's a clone of '$parent'";
+		die "can't migrate '$volid' as it's a clone of '$parent'" if $parent;
 	    }
 	}
 
diff --git a/changelog.Debian b/changelog.Debian
index 9449762e..bfb8574b 100644
--- a/changelog.Debian
+++ b/changelog.Debian
@@ -1,6 +1,8 @@
 qemu-server (2.3-14) unstable; urgency=low
 
   * bugfix #340 : don't set cache=none to cdrom
+  
+  * Migrate: fix check if a backing file exist  
 
  -- Proxmox Support Team <support@proxmox.com>  Thu, 28 Feb 2013 06:21:30 +0100