diff --git a/inc/caldav-PROPPATCH.php b/inc/caldav-PROPPATCH.php
index 9c187092..381e3c45 100644
--- a/inc/caldav-PROPPATCH.php
+++ b/inc/caldav-PROPPATCH.php
@@ -14,8 +14,11 @@ require_once('iCalendar.php');
 require_once('DAVResource.php');
 
 $dav_resource = new DAVResource($request->path);
-if ( ! ($dav_resource->HavePrivilegeTo('DAV::write-properties') ) ) {
-  $request->DoResponse( 403 );
+if ( !$dav_resource->HavePrivilegeTo('DAV::write-properties') ) {
+  $parent = $dav_resource->GetParentContainer();
+  if ( !$dav_resource->IsBinding() || !$parent->HavePrivilegeTo('DAV::write') ) {
+    $request->PreconditionFailed(403, 'DAV::write-properties', 'You do not have permission to write properties to that resource' );
+  }
 }
 
 $position = 0;
@@ -24,7 +27,7 @@ $xmltree = BuildXMLTree( $request->xml_tags, $position);
 // echo $xmltree->Render();
 
 if ( $xmltree->GetTag() != "DAV::propertyupdate" ) {
-  $request->DoResponse( 403 );
+  $request->PreconditionFailed( 403, 'DAV::propertyupdate', 'XML request did not contain a <propertyupdate> tag' );
 }
 
 /**
diff --git a/testing/tests/binding/1033-PROPPATCH-admin-bound.result b/testing/tests/binding/1033-PROPPATCH-admin-bound.result
index 9b4986c5..3579de1f 100644
--- a/testing/tests/binding/1033-PROPPATCH-admin-bound.result
+++ b/testing/tests/binding/1033-PROPPATCH-admin-bound.result
@@ -1,7 +1,7 @@
 HTTP/1.1 200 OK
 Date: Dow, 01 Jan 2000 00:00:00 GMT
 DAV: 1, 2, 3, access-control, calendar-access, calendar-schedule
-DAV: extended-mkcol, calendar-proxy, bind, addressbook
+DAV: extended-mkcol, calendar-proxy, bind, addressbook, calendar-auto-schedule
 Content-Length: 230
 Content-Type: text/xml; charset="utf-8"