--- cups-pk-helper-0.1.3/src/cups-pk-helper-mechanism.c	2011-09-02 11:30:26.000000000 +0200

+++ cups-pk-helper-0.1.3/src/cups-pk-helper-mechanism.c	2011-09-02 11:31:34.000000000 +0200

@@ -291,7 +291,7 @@ _check_polkit_for_action_internal (CphMe

                 return FALSE;

         }

-        if (!polkit_authorization_result_get_is_authorized (pk_result)) {

+        if (pk_result == NULL || !polkit_authorization_result_get_is_authorized (pk_result)) {

                 g_set_error (error,

                              CPH_MECHANISM_ERROR,

                              CPH_MECHANISM_ERROR_NOT_PRIVILEGED,