diff --git a/PVE/API2/Disks/LVMThin.pm b/PVE/API2/Disks/LVMThin.pm
index 83ebc46..ced4b6a 100644
--- a/PVE/API2/Disks/LVMThin.pm
+++ b/PVE/API2/Disks/LVMThin.pm
@@ -40,6 +40,10 @@ __PACKAGE__->register_method ({
 		    type => 'string',
 		    description => 'The name of the thinpool.',
 		},
+		vg => {
+		    type => 'string',
+		    description => 'The associated volume group.',
+		},
 		lv_size => {
 		    type => 'integer',
 		    description => 'The size of the thinpool in bytes.',
diff --git a/PVE/Storage/LvmThinPlugin.pm b/PVE/Storage/LvmThinPlugin.pm
index c24af22..b0cf3d2 100644
--- a/PVE/Storage/LvmThinPlugin.pm
+++ b/PVE/Storage/LvmThinPlugin.pm
@@ -184,6 +184,7 @@ sub list_thinpools {
 	    next if $lvs->{$vg}->{$lvname}->{lv_type} ne 't';
 	    my $lv = $lvs->{$vg}->{$lvname};
 	    $lv->{lv} = $lvname;
+	    $lv->{vg} = $vg;
 	    push @$thinpools, $lv;
 	}
     }