diff --git a/inc/CalDAVRequest.php b/inc/CalDAVRequest.php
index 7dd6e357..fa675568 100644
--- a/inc/CalDAVRequest.php
+++ b/inc/CalDAVRequest.php
@@ -380,14 +380,15 @@ class CalDAVRequest
     $badprops = new XMLElement( "prop" );
     foreach( $unsupported AS $k => $v ) {
       // Not supported at this point...
-      dbg_error_log("ERROR", " LOCK: Support for $v:$k properties is not implemented yet");
+      dbg_error_log("ERROR", " %s: Support for $v:$k properties is not implemented yet", $this->method );
       $badprops->NewElement(strtolower($k),false,array("xmlns" => strtolower($v)));
     }
     $error = new XMLElement("error", new XMLElement( "LOCK",$badprops), array("xmlns" => "DAV:") );
 
-    $request->DoResponse( 422, $error->Render(0,'<?xml version="1.0" ?>'), 'text/xml; charset="utf-8"');
+    $this->DoResponse( 422, $error->Render(0,'<?xml version="1.0" ?>'), 'text/xml; charset="utf-8"');
   }
 
+
   /**
   * Utility function we call when we have a simple status-based response to
   * return to the client.  Possibly