diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 7acd568fc..80d012b10 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2007-01-04  Corinna Vinschen  <corinna@vinschen.de>
+
+	(get_ifconf): Set MTU for loopback to more correct value.
+
 2007-01-04  Corinna Vinschen  <corinna@vinschen.de>
 
 	* fhandler_socket.cc (fhandler_socket::ioctl): Don't fake results
diff --git a/winsup/cygwin/net.cc b/winsup/cygwin/net.cc
index 83c634b90..f70618d22 100644
--- a/winsup/cygwin/net.cc
+++ b/winsup/cygwin/net.cc
@@ -1744,8 +1744,8 @@ get_ifconf (struct ifconf *ifc, int what)
 	    ifr->ifr_metric = 1;
 	    break;
 	  case SIOCGIFMTU:
-	    /* Default value for loopback on Linux 2.6 kernel. */
-	    ifr->ifr_mtu = 16436;
+	    /* Default value for MS TCP Loopback interface. */
+	    ifr->ifr_mtu = 1520;
 	    break;
 	  default:
 	    set_errno (EINVAL);