Index: /trunk/src/VBox/HostDrivers/VBoxNetFlt/linux/VBoxNetFlt-linux.c
===================================================================
--- /trunk/src/VBox/HostDrivers/VBoxNetFlt/linux/VBoxNetFlt-linux.c	(revision 55680)
+++ /trunk/src/VBox/HostDrivers/VBoxNetFlt/linux/VBoxNetFlt-linux.c	(revision 55681)
@@ -68,4 +68,10 @@
 #ifndef VBOXNETFLT_LINUX_NO_XMIT_QUEUE
 # define VBOX_FLT_XT_TO_INST(pXT)   RT_FROM_MEMBER(pXT, VBOXNETFLTINS, u.s.XmitTask)
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
+# define VBOX_DEV_NET(dev)                  dev_net(dev)
+#else
+# define VBOX_DEV_NET(dev)                  ((dev)->nd_net)
 #endif
 
@@ -2160,5 +2166,5 @@
     if (pThis->pSwitchPort->pfnNotifyHostAddress)
     {
-        struct net *net = dev_net(pThis->u.s.pDev);
+        struct net *net = VBOX_DEV_NET(pThis->u.s.pDev);
         struct net_device *dev;