--- vpnclient-orig/frag.c	2008-06-23 11:59:12.000000000 -0500
+++ vpnclient/frag.c	2009-11-12 15:15:50.915673034 -0600
@@ -22,7 +22,9 @@
 #include "frag.h"
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-#define SKB_IPHDR(skb) ((struct iphdr*)skb->network_header)
+/* 2.6.22 added an inline function for 32-/64-bit usage here, so use it.
+ */
+#define SKB_IPHDR(skb) ((struct iphdr*)skb_network_header)
 #else
 #define SKB_IPHDR(skb) skb->nh.iph
 #endif