diff -Nru gentoo-headers-base-2.6.23_orig/include/linux/if_ppp.h gentoo-headers-base-2.6.23/include/linux/if_ppp.h
--- gentoo-headers-base-2.6.23_orig/include/linux/if_ppp.h	2008-01-05 18:02:20.000000000 +0300
+++ gentoo-headers-base-2.6.23/include/linux/if_ppp.h	2008-01-05 18:03:43.000000000 +0300
@@ -113,6 +113,10 @@
 	struct ppp_comp_stats stats;
 };
 
+#ifdef __KERNEL_STRICT_NAMES
+#define aligned_u64 unsigned long long __attribute__((aligned(8)))
+#endif
+
 /* For PPPIOCGL2TPSTATS */
 struct pppol2tp_ioc_stats {
 	__u16		tunnel_id;	/* redundant */
diff -Nru gentoo-headers-base-2.6.23_orig/include/linux/if_pppol2tp.h gentoo-headers-base-2.6.23/include/linux/if_pppol2tp.h
--- gentoo-headers-base-2.6.23_orig/include/linux/if_pppol2tp.h	2008-01-05 18:02:20.000000000 +0300
+++ gentoo-headers-base-2.6.23/include/linux/if_pppol2tp.h	2008-01-05 18:06:40.000000000 +0300
@@ -19,8 +19,11 @@
 
 #ifdef __KERNEL__
 #include <linux/in.h>
+#else
+#include <netinet/in.h>
 #endif
 
+
 /* Structure used to connect() the socket to a particular tunnel UDP
  * socket.
  */