Index: /trunk/src/VBox/Devices/Network/slirp/udp.c
===================================================================
--- /trunk/src/VBox/Devices/Network/slirp/udp.c	(revision 45321)
+++ /trunk/src/VBox/Devices/Network/slirp/udp.c	(revision 45322)
@@ -278,5 +278,5 @@
      */
     if (   pData->fUseDnsProxy
-        && (ip->ip_dst.s_addr == RT_H2N_U32(RT_N2H_U32(pData->special_addr.s_addr) | CTL_DNS))
+        && CTL_CHECK(ip->ip_dst.s_addr, CTL_DNS)
         && (uh->uh_dport == RT_H2N_U16_C(53)))
     {