--- hplip-3.12.9/prnt/cupsext/cupsext.c.addprinter	2012-09-04 14:31:10.000000000 +0200
+++ hplip-3.12.9/prnt/cupsext/cupsext.c	2012-09-11 16:42:26.229950718 +0200
@@ -324,6 +324,7 @@ PyObject * getPrinters( PyObject * self,
     };
 
     /* Connect to the HTTP server */
+    cupsSetUser ("root");
     if ( ( http = httpConnectEncrypt( cupsServer(), ippPort(), cupsEncryption() ) ) == NULL )
     {
         goto abort;